error with reading variable data type not supported in expression in SSIS package

Hi,

In my Sequence container

SQL Task for FULL RESULT SET-SINGLE ROW assign variable with filename:: VFILENAME(Variable in SCOPE of Package level),

SQL task- Create Excel sheet

Data flow-OLEDB -Excel

Package 3 Tasks run successfully and Excel generated as per requirement but Sequence container shows in Red

and while saving the package shows Error of

Non fatal error occurred while saving the package

Data type of variable:VFILENAME not supported in expression

Error code: reading variable :0*COO470D0

Please help on to green in Sequence container

Thanks

--MADHU