Hi Tom and Amir, Thank you very much for your replies. I found it interesting to share my findings, but I would also like to gain insight into the cause of the errors. Although I have a problem in a PROC TABULATE with "..."N or '...'N, this is apparently not the case in a data step. In particular, I also get no errors when launching Tom's data steps above. So, "..."N and '...'N apparently work fine in a data step. In the hope that this will provide further clarity to the issue for some readers, I have provided new illustrative SAS code. Following Amir's advice, I have embedded the new illustrative SAS code and its corresponding log in a new question: PROC TABULATE TABLE statement using a SAS name literal variable name with ending capital N crashes. Thanks in advance. Kind regards, Peter
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