I have a process model that exports the contents of a cdt. In the export file I

Is there any difference in the setup of the export or the CDT itself between dev versus test and prod?

No, I have promoted the process model, cdts and data stores from dev to test to prod.

Do you notice any errors generated in the logs? Could you attach application-server.log and let me know the timestamp that you last ran that process?

I did not check the logs. Our environments are hosted in the cloud so searching logs is rather painful. If you have time to check the logs I could run the process and give you an exact time.

Please go ahead and do that, and I'll check the logs. Could you run it in both Dev and Test?

Ran in our development environment @ 1:24 PM; in our Test environment @ 1:28 PM all times are EST. Process in Test bombed. "There is a problem with task “Export CDT To Excel” in the process “Finance Dashboard”. "

I may have found the issue. The errors I saw in your logs are similar to those described here:
forum.appian.com/.../f-112349

The issue could be with the plugin itself. I checked, and your Dev environment is using a more recent version of the plugin than Test. Please create a support case and we will update the plugin to the latest version in your environments. If that doesn't resolve the issue, we'll continue troubleshooting to find the root cause.

It could also be that this issue is caused by a mismatch in the plugin version that the process model was created on, since it is being imported to an environment that is using an older version of the plugin. Once the plugin has been updated, try verifying the model in Dev, save and publish it, then re-import it into Test.

Helmut, the plug-in has been updated on your TEST site. The version of the Plug-in should now be the same in both DEV and TEST.

That fixed the problem. Thank Alok for updating the plugin. Thank you Aleksi for identifying the problem.