+ AA6YQ comments below
Joe - Tnx for the explanation.So your reply tells me the parenthesis and single quote marks around each call are required in all cases.
+ for simple expressions like
+ it;s best to use parentheses to make the order of operations explicit; they're free!
+ This expression using wildcard characters requires no parentheses:
Comment like '*photographer*'
+ but "multiple choice" expressions do require parentheses:
band in ('160m','80m','40m')