It is not going to work until AC folks fix this issue.
The only way you can use OA now is by typing in same data online in 1500 forms with OA
I just downloaded the EZ claims trial and have transferred the file from AC to EZ claims. This may overcome the problem because EZ claims asked me to set up the UPIN and NPI when I installed the program.
Will see if the file from EZ claims is accepted by OA.
If it does works, it will save lot of headache although it does involve additional investment and one more extra step in transferring the file
Guru Sahi