Split Files and Variable Order (MANOVA: Univariate command)

When split-file processing is in effect, the first variables in the matrix system file will be the split variables, followed by ROWTYPE_, the factor variable(s), VARNAME_, and then the variables that are used to form the correlation matrix.
A full set of matrix materials is written for each subgroup that is defined by the split variable(s).
A split variable cannot have the same variable name as any other variable that is written to the matrix data file.
If a split file is in effect when a matrix is written, the same split file must be in effect when that matrix is read into another procedure.