Thank you ChrisHemedinger, I closed all the data viewer and it worked! However, when doing the next program as follows /*Finally, merge the PROC FREQ results with your data:*/
data TB;
merge sorted_genotyped
counts (where=(clustername > ' '));
by clustername;
if count=1 then unique=0;
else if count > 1 then cluster=1;
drop count;
run; The following error was: 58 data TB; 59 merge sorted_genotyped 60 counts (where=(clustername > ' ')); ERROR: The value is not a valid SAS name. 61 by clustername; 62 if count=1 then unique=0; 63 else if count > 1 then cluster=1; 64 drop count; 65 run; NOTE: The SAS System stopped processing this step because of errors. WARNING: The data set WORK.TB may be incomplete. When this step was stopped there were 0 observations and 239 variables. WARNING: Data set WORK.TB was not replaced because this step was stopped. NOTE: DATA statement used (Total process time): real time 0.01 seconds cpu time 0.01 seconds attached picture of example of the character values of the variable: clustername
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