File Insert Failure RDA R4101Z1I

I am customizing R4101Z1I to write a record to the F4104 Item Xref table for some new Adds. It is a simple file insert to the F4104 in the ER but is not working.

I can do the same insert with SQL with no problem so it is not a duplicate key error.

I ran with the debugger and can see all of my key fields and other fields from the record. It gets to the insert and then all I get is a File I/O Error.

I ran with debug turned on and with level 6 and I can see where the UBE is setting the EDSP to Y right above where my code is but then nothing for my insert.