CMLR-770 — Incorrect variable definition
C3H was invoked for a variable definition, but such a definition is not valid in current point of configuration. The variable name used (printed at the end of message) is already known somewhere "above" the particular configuration node (i.e. toward the root) where C3H was used.
If you want to redefine the variable used, you must "climb" up to the node where it is defined. If you want to define a new variable, you must use another name.