Hi:
The one I use is:
*'; *"; stop; run; quit; %mend;
which is a variation of the string recommended on page 15 of this document:
http://support.sas.com/publishing/pubcat/chaps/61025.pdf
I keep submitting it over and over until I see this message in the log, because, as it says on page 15:
"Depending on how deep a hole you have dug for yourself, you might need to run this line several times. You’ll know you’re done when you see an error message that says “No matching %MACRO statement for this %MEND statement.” The line works on unbalanced quotes because anything between an asterisk and the next semicolon is treated as a comment by SAS, unless there is an open quote, in which case it is just part of the quote. For example, *”; will close a double quote if one is open, but will not start a new quote."
cynthia