Motion System Error Y+

H there

This has me puzzled, I have tried the same print 4 times and keep getting the same error 1 hour into a 4 hour print

Size of part is within print parameters

I have printed the same part numerous times before

Any suggestions?

I have physically checked Y Axis, Belts, Stop, Wiring to and from Board and I cannot see anything wrong

Cheers

EB