ERROR: Cannot open datafile

Hi,

There is a .csv that i created through PowerShell script as part of my SSIS package. Thereafter, the file is read by the Flat file source in my Data Flow task. However I got the error: cannot open datafile <filename>.

I'm running the package thru Integration Services Catalogs. I also put a full control on the folder where the file is created.

Is there something I'm missing out here? Please help!

Thanks.

Cherrie