After multiple calls with support over the last few months, I also had not found an acceptable solution and tech support seemed oblivious to this message string. While I was again unchecking and rechecking the direct deposit flags, I noticed that one employee had a blank earnings record inserted above the earnings hours I had entered. I deleted this blank record, saved the changes, and was able to successfully transmit payroll.

The last two times payroll has failed to send, it has been due to a blank earnings record for this same employee. All I've had to do to transmit payroll is to remove the blank record and resend. I haven't yet identified what is causing the blank record to appear during the transmission process, but at least this saves hours of extra processing time!