1099 Withholding Voucher Not Making it to the WTHD_TRXN_TBL Table

We have a situation where a handful of vouchers that are flagged for withholding are not making it to the WTHD_TRXN_TBL table after we run the Post Withholding process.

The vendors for these vouchers are setup as 1099 reportable with thier 1099 information under the 1099 options page on the vendor setup.  The vouchers are being posted as 1099 reportbale vouchers successfully.  After running the Post Withholding process we can see the vouchers with the correct amounts on the Update Voucher Line Withholding page (WTHD_LINE_UPDT).  However, these handful of vouchers never make it to the WTHD_TRXN_TBL table.  Other vouchers related to these vendors did make it to the WTHD_TRXN_TBL table, so I believe it is related to the voucher in some way.