Can't query process with errors in report

You can recover the error it in  a programatic way but using Appian API.....

There is an AppMarket plug-in that might help you get some info:  [mention:4071f2b3d0d141ae9b62561407d20600:f7d226abd59f475c9d224a79e3f0ec07] 

The challenge will be programmatically responding to the error event and using that to call your external incident management system. One option might be to start a "monitor" process instance for every process you start that has an internal clock that when it times out it queries the real process for the error details and then sends those to your incident system. This isn't ideal as you'll be doubling the number of process instances in your environment.

Another approach might be to write an entry to a database table for each started process, and then when each process ends to removes (or marks as complete) that entry, and then have a single process that regularly queries that database to find process instances that didn't complete, and then raises a request in your incident system. Better than the previous option, but still not ideal as you're inferring from data rather than responding to an actual event.

Finally you might want to use the fact that when process models encounter errors you can send alerts to various recipients. One recipient could be a dummy user whose email address is a mailbox that forwards the email to Appian and triggers and Appian process that then queries for the error and sends the details to your incident system. Better, but clunky.