Import Error just in GESOPP function

Hi,

Im trying to import some Sales Quotes (SQH) files through IMPORTSIL code.

If I use the IMPORTSIL code in GESOPP function I get this error:

If I use the exactly same code, with the exactly same file anywhere outside the GESOPP it works fine without errors....

I have no more ideas what should I do, but I need it to work in GESOPP (Projects) function!

All the field showing errors should be auto-filled, as they are outside that GESOPP function

Any suggestions?