Error message -251

[Brian J Rogalny]

Received this message today while cutting stencils out of 1/32" romark. Not sure what caused it but it seems to have something to do with my Atmos filter, which has new filters and charcoal a few months ago. Has anyone seen this message before.
Trotec Speedy 300 100watt

[Scott Shepherd]

-251

// communication not ready




That's from the manual. Not sure what it relates to, but that's the error. Are there any other symptoms, like the flashing light on the control panel pattern? That light sequence is coded to a small degree. Fast blinking means one thing, slow blinking another. Does the machine lose it's connection to the computer? Is does that all stay connected as normal?