Hi, The following code produced the desired results using SAS 9.4. PROC GLM DATA=IMPORT; CLASS v1 v2; MODEL v3= v1 v2; MEANS v2/TUKEY; TITLE 'Repeated Measures ANOVA FOR v3 with Tukey POSTHOC'; RUN; However, running it with SASUniversity (Studio) produces the following error message: ERROR: Invalid characters were present in the data. I tried converting my dataset to excel and SPSS before importing back to SAS. All variables are numeric. Nothing worked. Thank you for your help, Jeff
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