KB-2360 A user is locked out due to accessing an invalid task too many times.

Maggie Deppe-Walker — Thu, 13 Nov 2025 06:28:28 GMT

Current Revision posted to Appian Knowledge Base by Maggie Deppe-Walker on 11/13/2025 6:28:28 AM

Symptoms

A user is unable to access a task even though it has been correctly assigned.

Below are a few instances of the front end errors that users may observe:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

Additionally, the below error is logged in <APPIAN_HOME>/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED> is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Cause

The above messages indicate that an invalid task has been accessed by a user too many times. Appian has a rate limit that kicks in if users experience too many errors in a short window. If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

Action

The lockout period ends after a duration of 15 minutes and the user should then be able to access tasks as expected. Please note that there are no exceptions to this rule and the lock-out duration is non-configurable.

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: October 2025

Tags: user interface, application design, Performance, tasks

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

Maggie Deppe-Walker — Fri, 24 Oct 2025 04:20:56 GMT

Revision 19 posted to Appian Knowledge Base by Maggie Deppe-Walker on 10/24/2025 4:20:56 AM

Symptoms

A user is unable to access a task even though it has been correctly assigned.

Below are a few instances of the front end errors that users may observe:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

Additionally, the below error is logged in <APPIAN_HOME>/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED> is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Cause

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: October 2025

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

Maggie Deppe-Walker — Thu, 23 Oct 2025 06:12:11 GMT

Revision 18 posted to Appian Knowledge Base by Maggie Deppe-Walker on 10/23/2025 6:12:11 AM

Symptoms

A user is unable to access a task even though it has been correctly assigned. Below are a few instances of the error messages that users may observe:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

When this occurs, the below ERROR message is logged in <APPIAN_HOME>/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Cause

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: October 2025

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

hatim.pavthiwala — Tue, 21 Oct 2025 06:41:44 GMT

Revision 17 posted to Appian Knowledge Base by hatim.pavthiwala on 10/21/2025 6:41:44 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may observe:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

The above messages indicate that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in /usr/local/appian/ae/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

hatim.pavthiwala — Tue, 21 Oct 2025 06:40:00 GMT

Revision 16 posted to Appian Knowledge Base by hatim.pavthiwala on 10/21/2025 6:40:00 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may observe:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

The above messages indicate that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in /usr/local/appian/ae/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

hatim.pavthiwala — Tue, 21 Oct 2025 06:38:04 GMT

Revision 15 posted to Appian Knowledge Base by hatim.pavthiwala on 10/21/2025 6:38:04 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in /usr/local/appian/ae/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

hatim.pavthiwala — Tue, 21 Oct 2025 06:37:36 GMT

Revision 14 posted to Appian Knowledge Base by hatim.pavthiwala on 10/21/2025 6:37:36 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in /usr/local/appian/ae/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

hatim.pavthiwala — Tue, 21 Oct 2025 06:36:25 GMT

Revision 13 posted to Appian Knowledge Base by hatim.pavthiwala on 10/21/2025 6:36:25 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in /usr/local/appian/ae/logs/tomcat-stdOut.log.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

The lockout period ends after a duration of 15 minutes and the user should then be able to access tasks as expected. Please note that there is no exception to this rule and the lock-out duration is non-configurable.

[DRAFT SP-1705] A user is locked out due to accessing an invalid task too many times.

hatim.pavthiwala — Mon, 20 Oct 2025 05:35:06 GMT

Revision 12 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 5:35:06 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 05:05:13 GMT

Revision 11 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 5:05:13 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:46:57 GMT

Revision 10 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:46:57 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:45:13 GMT

Revision 9 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:45:13 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If an invalid task has been accessed more than 10 times in a 15 minute time span, the user who is attempting to access the invalid tasks will temporarily be locked out from tasks.

When this occurs, the below ERROR message is logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:43:01 GMT

Revision 8 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:43:01 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If more than 10 of the above mentioned errors are encountered within 15 minutes, the user will temporarily be locked out from tasks.

When an invalid task has been accessed more than 10 times in 15 minute time span, the below ERROR message being logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:33:34 GMT

Revision 7 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:33:34 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If more than 10 of the above mentioned errors are encountered within 15 minutes, the user will temporarily be locked out from tasks.

When an invalid task has been accessed more than 10 times in 15 minute time span, the below ERROR message being logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:33:06 GMT

Revision 6 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:33:06 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If more than 10 of the above mentioned errors are encountered within 15 minutes, the user will temporarily be locked out from tasks.

When an invalid task has been accessed more than 10 times in 15 minute time span, the below ERROR message being logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:32:44 GMT

Revision 5 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:32:44 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If more than 10 of the above mentioned errors are encountered within 15 minutes, the user will temporarily be locked out from tasks.

When an invalid task has been accessed more than 10 times in 15 minute time span, the below ERROR message being logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:32:24 GMT

Revision 4 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:32:24 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If more than 10 of the above mentioned errors are encountered within 15 minutes, the user will temporarily be locked out from tasks.

When an invalid task has been accessed more than 10 times in 15 minute time span, the below ERROR message being logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:32:07 GMT

Revision 3 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:32:07 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If more than 10 of the above mentioned errors are encountered within 15 minutes, the user will temporarily be locked out from tasks.

When an invalid task has been accessed more than 10 times in 15 minute time span, the below ERROR message being logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 04:31:45 GMT

Revision 2 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 4:31:45 AM

Symptoms

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

This indicates that an invalid task has been accessed by a user too many times.

Cause

If more than 10 of the above mentioned errors are encountered within 15 minutes, the user will temporarily be locked out from tasks.

When an invalid task has been accessed more than 10 times in 15 minute time span, the below ERROR message being logged in the /usr/local/appian/ae/logs/tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED>  is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

[DRAFT SP-1705] A user is locked out due to accessing too many invalid tasks

hatim.pavthiwala — Mon, 20 Oct 2025 03:08:08 GMT

Revision 1 posted to Appian Knowledge Base by hatim.pavthiwala on 10/20/2025 3:08:08 AM

Symptoms

An invalid task has been accessed too many times leading to the below ERROR message being logged in the tomcat-stdOut.log file.

ERROR com.appiancorp.process.engine.TaskErrorRateLimiter - A user with UUID <REDACTED> is temporarily restricted from accessing any tasks due to viewing too many invalid tasks.

Cause

Appian has a rate limit that kicks in if users experience too many errors in a short window. Below are a few instances of the error messages that users may experience:

"User does not have permission to view this task"
“Task does not exist”
“Task is canceled or completed”

If more than 10 are encountered within 15 minutes, the user will temporarily be locked out from tasks.

Action

To determine which user(s) this is impacting, you may search for the mentioned UUID(s) in the Admin Console or Appian Designer search bar to find the impacted user(s).

The locked period ends after a duration of 15 minutes and the user should then be able to access tasks as expected. Please note that there is no exception to this rule and the lock-out duration is non-configurable.