"Problem creating a graded size for piece..."
When I try to save a particular pattern in PDS after amending a model, this particular piece gives me the error message "Problem creating a graded size for piece...". It says to cancel and view all sizes which doesn't actually show any problems when I look at it. I've turned on the grade, looked at the point numbers, the grade numbers and other things. I have even gone so far as to recreate the entire piece and it still gives me this message. Any ideas?