Message similar to subject line every time I try to click soft limits on.

Been this way for a while so I don't remeber exactly when it started or what I might have changed just prior.
Homing works fine, all limit switches funtioning, machine is well within the homing/limits settings, with no limit switches triggered.
I tried disabling one axis at a time and then disabled all of them together . . . same error

Same error with Gcode loded or with no program loaded. Machine is running fine.
So it is not something glaringly obvious. Got me stumped . . . prolly something simple I am overlooking.
