The automatical reorganisation of the MQ Tables is running into a known bug which causes the errormessage as described:
U0011349 DB table 'MQWP' needs to be reorganized. This will be done as soon as possible.
This errormessage is shown in a gap of 1-10 minutes
How to Solve?
The issue is solved with Version 9.00A Servicepack 7 and Version 10 Servicepack 1
go to client 0, UC_SYSTEM_SETTINGS and set the parameter MQ_CHECK_TIME on "0" This prevents the Reorganisation from running, the reorg is then processed as in the versions before, this should solve the issue until you are able to upgrade your system.