Hi all
With my computer that installed VFP9 , my pro work very good with codes following.

* Main Program for Dutoan.app
*  Application

SET REPORTBEHAVIOR 90
listener=NULL 
DO reportoutput.app WITH 5,listener
listener.QuietMode=.T. 
_REPORTPREVIEW="reportpreview.app"
?MESSAGEBOX(VARTYPE(listener), 0)
READ EVENTS

I build that my prog with exe file and setup my pro on others computer .
Of course, I distribute ReportOutput.app and reportpreview.app files with exe file
However, when start the prog on computers without install VFP9, I get a message “oListener is not object”. What difference environment between two kind computers? And how can I solve my problem?

Please help me.

Canh