SAP BPC 7.5 NW SP09 - full optimize never ends. Job can not be stopped

Hi experts,

we sent a full optimize process in order to compress an application but it never finished.

I noticed that through BW transaction RSPC the process chain: Full optimization stops in "Collapse box" step and become red.

so the cube were locked and can not be used. we checked through in BW TE SM50 that process is in "Running status"

I tried to stop it through BW TE SM37 but can not be done due its status.

Please any idea how to stopped it and how solved full optimization issue?

thanks