Understanding the error "DIMENS=2 is too large for a R by C contingency table" from PROC CORRESP
The default value of 2 in the DIMENS= option is too large when there are only two rows or columns. In this case, specify DIMENS=1 in the PROC CORRESP statement. See the DIMENS= option description in the CORRESP chapter of the SAS/STAT User's Guide.