QAD 2017 Enterprise Edition > User Guides > Periodic Costing > Working with Periodic Costing Results > Troubleshooting Other Cost Issues > Multiple Vouchers During Mass Layer Transfer
  
Multiple Vouchers During Mass Layer Transfer
You have two vouchers from Periodic Costing during a mass layer transfer.
Probable Cause
When you ran PC calculation, another user was running an Operational Transaction Post (25.13.7). This caused the system to create a partial Glt_det record and store the record.
Solution
It is better to avoid this situation and consider running the PC calculation without the OTP running at the same time.