Webi report Prompt throwing error.

Hi,

I have a webi report built on Bex query. Bex query has some variable which is appearing as prompt in webi report.When a particular user runs its throwing error.Attached is the error screenshot.

The strange thing is that myself(administrator ) and some other users are not getting this error.

So is it something like related to user security/authorization issue with that user.

Security team has checked the users authorization and they say its fine. Any idea how to debug this issue.

Please help.

Thanks

Faizan