Following a maintenance push a couple weeks ago, users are reporting that they are unable to connect to Endevor from Compuware Topaz. Found following error message in the Endevor web services joblog:
Release : 18.0
This message means that the Endevor Webservice is not compatible with Backend (Mainframe Endevor), this error message comes from 64 bit Java support PTF (using new encryption algorithm).
Apply Endevor maintenance to Backend, update Endevor STC libraries (reinstall Web Services), make sure Endevor Web Services is in sync with Mainframe Endevor.