A laptop installed with TreeTech 3.1 is configured for a serial connection to a GCM-86000. After starting communication in TreeTech, there are no startup errors but the serial communication link fails.
Using TreeTech to do GCM backups with the demise of ProBlock
On page 25 of the TreeTech Engineering Guide (F-26640), the recommended setting for ODSR (output date set ready) is ON for a GCM-86000.
At times, the age and model of laptop may require that ODSR be set to OFF. Try it.