Woodie,
> I am getting this error message on client pc's when they try to run a report in our new system built with VFP 9: "variable _REPORTOUTPUT is not found". REPORTBEHAVIOR is set to 90. Am I missing a runtime file for the report writer or what?
You need to distribute REPORTOUTPUT.APP with your application AND also set the value of _REPORTOUTPUT to point to its location in your startup code. In Runtime mode, _REPORTOUTPUT is by default empty. You'll want to do the same with REPORTPREVIEW.APP and _REPORTPREVIEW.