Info Package selection criterion

BW experts,

I have a tricky situation. We pull data into BW1 from BW2. the filter criteria in the infopackages was 0DOC_TYPE and we used to pull different document type like TA etc.

Now we want to pull data where the DOC_TYPE is blank. How do I do that with the infopackage. I tried "#" but that does not work....any suggestions?

Thanks

Ashwin