KB-2111 "Does not exist: Process" error thrown when accessing a process instance

Symptoms

When accessing a process instance via the Monitoring tab, the following error is thrown:

Load Error
Errors
This process diagram could not be opened due to the following errors.
Does not exist: Process

When using the Start Process smart service, such as within a Web API, the following error is returned:

Error when parsing process details or variables

The following error is printed in the application server log in both instances above:

ERROR com.appiancorp.expr.server.reaction.smartservicebridge.SmartServiceBridgeReaction - Exception occurred during activation of ReactionFunction {key='sys.smartService.start-process-2', class='com.appiancorp.expr.server.reaction.smartservicebridge.PluginSmartServiceBridgeReaction'}
...
Caused by: com.appiancorp.suiteapi.process.exceptions.InvalidProcessException: Does not exist: Process

Cause

The process instance has been archived or deleted.

Action

If the process has been archived and its data is needed by the parent process, follow the steps outlined in KB-1186 to unarchive the process instance.
Adjust archival/deletion thresholds in the Data Mangement tab to allow future process instances to be maintained for the desired amount of time after completion.

Note: Increasing the length of time process instances are maintained before archival/deletion can increase system memory and disk resource utilization of the Appian environment.

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: November 2021