I’m also getting this problem: "object: mmm.mahalaobis" and "message: operands don’t match"
I wonder if there is an easy fix.
NVM: I found the problem on the CataRT FAQ:
Q: Help! CataRT doesn’t work, I’m getting error messages mnm.mahalanobis: operands don’t match
A: Don’t be so easily frightened! Be bold and go ahead! This message just means that there is no data loaded.