problem with importing data from Excel

Hello

I use Navision 4.0, table 370 (Excel Buffer). Situation: there are cells in Excel(2003) with number format. If the value is 10^15 or greater then if I try to import it I get error in the line

"Cell Value as Text" := DELCHR(FORMAT(XlWorkSheet.Range(xlColID + xlRowID).Value),'<',' ');"

It seems that the FORMAT function can't handle the variant containing decimal value 10^15 or greater. When I preformat cells as text or put an apostrophe in front of the number in Excel then i get no problems but I doubt the users would like to start doing it.

I'd like to know if there is any other way to turn the variant value into text? I've run out of ideas ](*,)

Thanks in advance.