Ensure the user has security rights to create EFT transmission files:
  1. In Administration, click Security. 
  2. Open the appropriate user group.
  3.  Highlight Batch under Group Privileges and select Options.
  4.  Highlight Gift.
  5.  Mark 'Create EFT Transmission Files'.
  6.  Click OK.
  7.  Click Save and Close.

If the batch has been committed and is not a recurring batch, this can be grayed out. If you need to work in the batch again, mark the batch as recurring.