Communication error with GRBL

[davet354tfd]

Been running a carve today. V-Carve said it would take just under 2 hours. I have carved longer than this before.
But about 45 minutes into the carve I get a "Unknown problem has been detected Communicating with GRBL"
This happened 3 times today on the same carve.
I finally broke it up into 8 separate carves to get it done.

I finally turned off my wifi.

Computer is updated.

I have had this happen 1 or 2 times in 2 or 3 years.

I will check the cables.

But I have no other ideas on what to look at/for to eliminate this problem.

Thanks

Bob