NW 7.0 sp3 ABAP+JAVA App server fails to start - disp+work.exe is yellow

Hello,

I have hit a bit of a snag with my SDN subscription system setup. the system was installed working fine until something happened while running SGEN and the system hung.

Upon attempting restart the application server disp+work.exe is yellow and I cannot log in.

The text from the status field is: 'Running but Dialog Queue standstill, J2EE: Synchronizing binaries'

Also I can't stop the app server.