WebIntelligence Rich Client BOXI3.1 - SP4 unexpected behavior ( WIS 10910) on refresh

Hi Experts

Refreshing a document in Web Intelligence Rich Client generates the following error message:

Database error. The text of the database error is: (CS)  "unexpected behavior" ( WIS 10901).

PS: this report works fine when running in Infoview ,this is specific to Rich client.

Any ides?

Thanks in advance

Saurav