train and test set are not compatible - Weka

[Nik1985]

Hello,

I have a data set (.csv file) which I have split into Test and Training set
(using random no generator).
There are 7 attributes and a class variable which is nominal with two levels
(R and G)

List of attributes:
There are 2 nominal attributes with 2 levels each and 5 numeric attributes.

Nominal attributes
Preference - Elvis and Beatles
Exercise - Yes and No

Numeric attributes
Age - 15 to 80
Veggies per day - 1,2 and 3
Miles - (minus) -889 to 1000 [-ve to +ve]
Pets - 0,1,2,3,4,5 and 6
Friends - 0,1,2 and 3

I am using J48 classifier for this data set. When I run the two sets
independently on Weka, it works but when I use the test set under the
"supplied test set" option, I get an error message "train and test set are
not compatible"
I went through a couple of articles in a few forums and the order of the
nominal values could be creating the issue but in my data I didn't find this
issue.

Can you please help me resolve this issue?

 

[Predictor]

Have you checked the documentation for the meaning of this error, or consulted the Weka Web page (

http://www.cs.waikato.ac.nz/ml/weka/)?