Light Optimize Error

Hi Experts

Light optimize process chain is failing with below error message we are on BPC10 Version.

Error :!:000 Model Financial Package Status : ERROR

Issue:

Light process chain is failing from last few days, with below error(screen shot attached).  If we re-run thechain it is getting successfully completed with any failure.

even some  time it will complete successfully.

Analysis done:

1. No huge loads are running during that time
2. In RZ10/11 rdisp/max_wprun_time : 3600
3. it is failing at Collapse Step–there was no log at that step

Please need help in this

Many Thanks

Purushottam