Box's test warning

Posted by The Burl on Jun 13, 2013; 5:28pm
URL: http://spssx-discussion.165.s1.nabble.com/Box-s-test-warning-tp5720700.html

Hello,

I'm neck-deep in dissertation data analysis and can't get Box's to run for my MANCOVA. I get this warning in the output:
Warnings
Box's Test of Equality of Covariance Matrices is not computed because there are fewer than two nonsingular cell covariance matrices.

Here's how I set up my data:
looking at 2 groups
6 DVs
1 fixed factor (IV) at 2 levels. (this may be my problem...) Isn't this fixed factor essentially just set up as a grouping variable?? So I have 1's for one group and 2's denoting the second group...
My fixed factor is set up as "nominal" and my DVs are "Scale"

Please help!
Thanks in advance!
-Jon