Error - Your latest transaction batch has not been fully calculated

When creating a GL batch you may receive the following error message: Your latest transaction batch has not been fully calculated. please reapply the mappings on the latest transaction batch before creating a new one. If this error persists please contact Projector technical support at 617-431-4111 x1 or support@projectorpsa.com

This error occurs when a batch creation failed. This results in an empty batch that blocks the way.

Delete the offending batch. If you search for all batches (tick all checkboxes, don't filter on accounting period, etc) then you will find an empty batch. Most likely at the top of the list. Delete it. Your next batch creation should succeed.