Hi Cristina,
Some suggestions:
1. From the java class exception I see you are using Gen 8.5 and probably a Gen web client/java proxy client?
There was a similar symptom "#$UNPK$# UNPACKAGED PROC STEP" problem reported for Gen 8.0 IE2 if the Build Tool token OPT.TUXVER had not been set to the value of "11" for the new support of Tuxedo 11. However I am not sure if that is required for Gen 8.5. SAP Portal Services (r8 Release Notes -> Toolset/New Features)
2 Is the UBBCONFIG file configured correctly? Configuring the UBBCONFIG File - CA Gen - 8.5 - CA Technologies Documentation
3. If above is of no help it may be best to login to support.ca.com and open a new case: https://comm.support.ca.com/csupport/CaseManagement/cases/new
For that case please upload:
A trace file from the client after enabling "CMIDEBUG=ON" in the commcfg.properties file: Comm Config Files - CA Gen - 8.5 - CA Technologies Documentation
The ULOG* & lg* files from the server corresponding to the above client trace file.
Also advise if this a Gen web client/java proxy client and what Gen 8.5 PTF level is being used for client and server.
Hope that helps.
Regards,
Lynn