Hello,   I guess you know this , but just to be sure …   You CANNOT contact SAS Technical Support regarding your question on PROC TRAJ. But, of course, you CAN post your question into the SAS Communities and that's what you have done. I hope other PROC TRAJ users can help you out. You can search the SAS Communities for similar or other PROC TRAJ questions.   PROC TRAJ is not a procedure developed, distributed, or supported by SAS Institute.  It is a user-written procedure available from a third party.  When asked about PROC TRAJ, SAS recommends customers do an internet search for it.  For questions, customers need to contact the author of that procedure directly for assistance.   The PROC TRAJ web page is :    http://www.andrew.cmu.edu/user/bjones/   SAS does not have a procedure that is an alternative for PROC TRAJ at this moment.   BR, Koen ... View more