When a payables account is set for Automatic Batch Processing in one of the Bank Details set within the system, the latter account will no longer be available for selection under Payments tab > Payment Processing > Bill Payments Processing > A/P account.
An alternate solution is to designate a distinct payables account that will be used in processing transactions through Automatic Batch Processing.
Here are the steps that you need to do:
1. Navigate to Payments tab > Setup > Bank Details.
2. In each of the Bank set to generate EFT File Templates;
a. View the information set under the EFT Template Details tab.
b. Under Automatic Batch Processing Settings section > Accounts Payable field, make sure that the account specified is not the one that is intended to appear in the A/P account field of the Bill Payments Processing page.