A Batch Detail transaction had the following error:
GM377 - Alias determined but no Merchant ID exists.
This error occurred because wrong Merchant id value was uploaded via CDR ADU. The MerchantID value in the file did not match the value in the Web_Merchants table.
To correct the error and be able to post the batch, delete the problem batch item from the current batch. Adjust the Merchant id value in the data file for that one problem record and re-upload that one record.