Import data - no data found error message - CSV

Hi,

I had been using the rapidminer for 2 days, I had imported several times the same structure csv, I had, but somehow it started to unrecognized the csv couple hours ago. I tried everything, the message always the same. No data found. "Try changing the column separator.." I checked the column separetor is good, it was good also erlier.

Do you know how I can solve this?

Thanks

Mark