Library Master, Main, Automatic Update. From the Help file.

Automatic Update

Use Automatic Update to automatically start the update or posting process of journals and registers. You can choose any number of journals or registers to update in advance. This task scans the chosen journals and updates them in a logical order. The time at which this process begins can be entered in advance.

Note This task does not apply to the General Ledger module. It is recommended that you print the Auto Update File Report prior to performing the Automatic Update. Click the Print button to generate the list. This can be used to compare selected updates to those completed when you run the Automatic Update Log File Report.

Automatic Update uses the accounting date of the user running Automatic Update. When updating registers and journals, caution must be exercised when flagging individual program files for update in the Maintain Auto Update task. The accounting date of each update program should be verified prior to selecting the program for update. You can modify the application system date as needed before running and initiating the automatic update program.

Are you using the Starship Link or running through ODBC? If you're using the Starship Link you should be able to update a batch while another batch is being used for shipping.