Thanks for the response Kalyan.
Reading the thread link you provided helped me in that I was using characters in my data connection wizard file name. Some of the formulas I tried are;
concat(lastName, ", ", firstName, "_NEIS")
concat(lastName,"_",firstName,"_NEIS")
concat(lastName, firstName, " NEIS")
All of which have no errors when I verify the formula.
I also have Allow Overwrites checked & Close the form chosen within Submit options.
Regardless of which formula I use, I get this error when resubmitting a form.
Any other ideas?
Thanks again.
JD
Joe D