When I run the following code:

With rsPI
txtFSN.Text = !FSN
txtFirst.Text = !First_Name
txtLast.Text = !Last_Name
medSSN.Text = !Soc_Sec
txtMI.Text = !MI_Name
...

I get "Run time error '94': Invalid use of Null" with the
debug pointing to the "txtFSN.Text = !FSN" line. If I comment that out and rerun it, I get the same error on the "txtMI.Text = !MI_Name" line. With that line (and the following assignment lines) commented out, the form displays OK.

Can someone explain the concept of "Null" as used in this error message? And what I need to do to correct the problem?