Hi,   Thanks for your follow-up question.  I should have provided a reason for suggesting you contact Tech Support in my earlier reply.    Based on the description of your model and data, it was not clear that PROC SYSLIN was the appropriate procedure to use.  The SYSLIN procedure is generally used for continuous endogenous variables rather than ordinal data.  I thought that a more detailed discussion of your desired model and analysis might be required in order to determine the appropriate procedure(s) to use.  That type of detailed discussion is better addressed through Tech Support than through the forum.    I hope that helps! DW  ... View more