Error importing txt object

I've exported the form 46 in TXT format. I've changed the object number and description and when I try to import the TXT I received the following error:
XPos cannot be 102976, the error is at position 581 of the txt file.

I checked the TXT file and found that the following:
{ 1000000004;TextBox;102976;550 ;1700 ;440 ;ParentControl=1;
InColumn=Yes;
SourceExpr="Closing Line Code" }

The TXT file is correct, the textbox property, in object designer, is really 102976.

Is this a bug?

Thanks,
Alessandro