Recently a customer contact CA Automic support with the following error message.
ORA-20040: Subchain nesting only allow 33 levels
Please note this message is as designed. Applications Manager only allows for 33 nested subchains in a process flow. A common scenario where this could occur is on a looping request job condition which inserts the job back into the process flow. If the condition loops 33 times the error message mentioned above will be displayed.