X-Spot error codes

First of all I love the display on the X-Spot. Lots of useful information.

The unit I am working on now has several errors.

It has one edge not found error, four tab not found errors, and one closed not found error.

What is the difference between an edge, a tab, and a closed not found error?

I could not find it in the manual.

Also, does this seem indicative of problems with the wheels/sensors or more of a logic board issue?

Thanks

Mike
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