BAPI or Function to update PP Production Order Operation Short Text

I'm looking for a BAPI or call function that will update the short text field in a production operation (AFVC-LTXA1). I've used BAPI_ALM_ORDER_MAINTAIN with limited success (even though it appears SAP did not intend its use with PP Production Orders). The problem with BAPI_ALM_ORDER_MAINTAIN is that it only updates the operations in sequence 0. It generates the following return message when you attempt to update operations in other sequences within the order...

"Operation to be changed was not found".

Anyone have any ideas?