Urgent: Not Able to get optimiser run LOG

Dear Gurus,

We take the SNP run in backgroud..after the run we use to download the optimiser log from Transaction -/SAPAPO/SNPOPLOG .(LOG type was Display results in text file.).for analysis purpose.This is our routing work.

But due to some error i am not able to display the log now.please suggest if any functional setting need to be checked ..

regards

Kiran