Unable to shutdown .NET scripting VM. %1 workers still attached

Error code –10181
Error constant EL_DNET_WORKERS_NOT_DETACHED
Parameter 1 The number of worker threads.
Probable cause

MobiLink server was unable to shutdown the .NET scripting VM because there are worker threads still attached. There may be a start class that is not respecting the shutdown, or is delaying its response to the shutdown.