User is getting error:

Fatal error: Object XXXX Process XX not found.

User is not using performance boosters.
User is getting error on multiple sessions so object number and process number change.
User is a DEM user.
Nothing has changed in user configuration.
No other user is getting the error that he knows of.

Anyone seen this before?

Hello,
This problem can be the result of many causes.
.Deleted objects from DEM.
.Deleted objects from the system
. etc

The workaround for this is:
.- Look at the log.bshell at $BSE/log directory.
.- Look at the log for your database.

With this, we will have a clearer view of the problem.
Good luck.

Thanks, I will check this out.