Hi Jyothy,
I am a BW person and my BO colleague reported the same issue. However when i used to execute the same BW query, it used to get executed successfully.
After looking into the BW system, I found many dumps with memory errors. After much analysis, I concluded that the BW info provider on which the BO query was based on, did not have indexes created rather in a failed state. I had to manually create them. On the sideways, also notified the BASIS people to clear some memory.
As a diagnosis, just the BW person to execute the query in BW for the same info provider and if runs fine, then the issue is in BW extraction mainly.
Hope this helps.
-Mohamed Shadab