KB-1237 Generic error thrown when attempting to start a process with sub-processes

When starting a process that contains one or more sub-processes, the process cannot be started with the following error:

The system has encountered a problem

We're sorry! A problem occurred while processing your last request. 

Please contact the system administrator for more information

The following error message is then printed in the application server log:

13:31:26,923 INFO  [com.metaparadigm.jsonrpc.BeanSerializer] (ajp-/0.0.0.0:8009-5) analyzing com.appiancorp.process.design.validation.Error
13:32:38,638 INFO  [stdout] (ajp-/0.0.0.0:8009-16) 2016-08-30 13:32:38,637 [ajp-/0.0.0.0:8009-16] ERROR com.appiancorp.process.runtime.processmodels.ConfigureProcessAction - com.appiancorp.suiteapi.common.exceptions.InvalidStateException: The Process Model contains unpublished sub-process and cannot be started.
13:32:38,638 INFO  [stdout] (ajp-/0.0.0.0:8009-16) com.appiancorp.suiteapi.common.exceptions.InvalidStateException: The Process Model contains unpublished sub-process and cannot be started.

Cause

One or more sub-processes within the parent process do not have a published version, preventing the parent processes from starting.

Action

Save & Publish all sub-process models within the parent process.

Affected Versions

This article applies to all versions of Appian.