Interesting discovery - Can you figure out what's wrong?

Protoneer:
Peter, String has a huge advantages... :slight_smile: It prevents a huge amount of frustration.

It also causes plenty of frustration as well.

The function I am working on will generate GCode commands.. I just want to build simple string but I am finding it hard to even just add a char to char *. :fearful:

sprintf(), strcat(), etc.