Hi,
I wrote one query in Query table as follows...
SOUR_AREA: Trim(IIf(IsNull([PANELOUT].[AREA]),"",[PANELOUT].[AREA]) & IIf(IsNull([INSTROUT].[IAREA]),"",[INSTROUT].[IAREA]))
When I run the Result Its working fine... But when opening the form I getting the follwoing error...
"The isnull...