When I change the source package of a report I got the error "RSV-VAL-0001 Validating the variable expression" and then it refers to a query which does not exists any more in the report.

So far no problem.... But there are no variables defined in the report at all. So where does this error come from ?

If I do a search on apart of the query refered to in the error message I got no result at all.
And the report runs OK, so whats is the problem ?

I think there is something left behind from an old report where this one is a tread of, but how can I clear that stuff which is not visible not even with "Show Hidden Items" on.

Check the report specification XML for the expression it is complaining about. You should be able to figure out from the XML context where the variable is located. If you don't find the UI equivalent, you may even try to remove it in the XML directly (of course with the whole context tree).

Thank you Tomáš,

I found the issue in "namedConditionalStyles".
This means that the search option does not search in ConditionalStyles. Is this a bug or intended ?

It looks like a bug to me, but I guess the proper course of action is to open a case with support.