Is there a way to make SAS stop upon the first warning or error?

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The ERRORS=1 option was previously suggested, but that only stops he ERROR messages from writing to the log. I would suggest another system option ERRORABEND which will stop the program from further processing for most errors. I don’t know of an option to terminate processing due to warnings, but I think that you could add a macro like the following to stop processing.

%macro check_for_errors;
   %if &syserr > 0 %then %do;
      endsas;
   %end;
%mend check_for_errors;

data test1;
    <data step code>
run;
%check_for_errors;

You could repeat the macro call after each step of your program, and it should terminate at the point that the error code is anything but 0.

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