B.O. WebI, Clauses "NOT in list" and "NOT equal to" both results in error

Hello everyone,
I'm creating a dashboad using B.O. Webi,

When applying the filters, In any of them if I choose 'NOT IN LIST" or "NOT EQUAL", it results in this error: "mddatasetbw.getcelldata (ies 10901) (errror: inf".

Therefore if I use "IN LIST" or "EQUAL TO", it does work fine.
Does anybody there know how to solve this issue?
Many thanks