The truck crashed 4 out of 6 times upon summoned, after the guidance was started. User's plane was on taxiway well behind the truck.
There are two issues discussed here:
1) The fact the truck goes away if you approach it too dangerously to it, which is a behavior that CAN be disabled as explained above, and of course it's not a bug.
AND
2) The error message in the first message.
If you are having the error message, please indicate ALL the following informations:
- The airport used ( if it's not default or an FSDT one, identify the 3rd party scenery used )
- Your approximate position when you called the Follow Me
- The destination selected ( a Gate, or a Runway start position )