>I choose a report and click the NEXT button to be able to filter the data. But then when I click the FILTER button I receive the following error. Does anybody using SFR 5.1e ever had that error?

I got that error and was using 5.1c I think. The problem is SFQuery isn't populating a fields collection, and assumes it is. SFQ than tries to populate it, but is doesn't work, cause SFR specifies a different Fields Collection class for SFQ to use (but that condition means you have another problem anyways)

The reason the fields aren't getting populated could be that you are using a DATAGROUP for the report that doesn't exist, or isn't setup right.

If it is, there was a problem at one point using Filter and DataGroups at all, but I think that was fixed in late June.

If you can verify that the DATAGROUP stuff is good to go, try deleteing REPMETA to see if that fixes it.