Forcite cell annealing failed - Vers. 6.1.

Hello,

I want to investigate ionic liquids in an amorphous cell.

First I optimized the geometry and assined charges using the DMol Module (ESP charges, force fileld pcff)

Then I used the charged output files of anion, cation (20 each) and my gas (4atoms)  and build an amorphous cell using again the pcff forcefield but current charges, Electrostatic: Ewald; van der Waal: atom based

then came a energy optimization using the forcite dialogue and here charges: use current and Electrostatic: group based, van der waal: group based

Then I intended to anneal my cell using the following: standard parameters, 1 cycle, Temp 300-500K, 100 steps and then I always get the same error

2014/02/06@08:51:01 [VBACP] - cell Forcite AnnealERRORMatServer terminated with unknown error  status.
2014/02/06@08:51:10 [VBACP] - cell Forcite AnnealERRORError on Job Complete. Study table creation failed. The  trajectory is marked as invalid and is unusable.
2014/02/06@08:51:10 [VBACP] - cell Forcite AnnealERRORFiles not removed from server due to previous  errors.
2014/02/06@08:51:10 [VBACP] - cell Forcite AnnealWARNAs instructed, files have been left on remote server, these  may need to be manually archived

Any ideas why?

Best regards