Since you can get the label setting to work if you set it to MemWidth, the problem must be where CPUwidth is defined in the evars.rc file. Check for any potential line-wrapping issues (i.e., cpuwidth actually on the end of the previous line), odd whitespace characters, misplaced quotes, etc. Make sure if it's quoted that you have one " at either end and not two `` or something like that. Setting an evar to an empty string will also produce an undefined error - I know, as I've already done that. =P