Thanks Chris and Sandip,
Finally I have the method server log file & I am not able to understand the issue out of this. Could you please help on this.
The file size is very less around 110KB.This issue happened only during particular dates 20th & 21 may-2014 and for some files.
The Released ECN task had about 500 drawings attached to it.Out of this about 90 files corrupted and not opening in Pro-E. They are all with one iteration.
I have attached the files for your reference.
Thanks,
Ganaraja