Event 181 in Eventviewer on AOS

I am trying to update the cross-reference in our development database. During this provess, the axapta windows closes and I get an Event 181 in the eventviewer. The description for the event is: “Object Server <AOS_NAME>: AOCP Connection error: Client thread 0x38c for session 4(admin) canceled”. When I start the process again, the same thing hapens. Does anybody have any ideas?