Date:         Tue, 21 Jul 1998 10:42:29 +0500
Reply-To:     Bernard Tremblay <bernard@CAPITALE.QC.CA>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         Bernard Tremblay <bernard@CAPITALE.QC.CA>
Subject:      Re: Local macro variables
Comments: To: SeidlZ@TESCOSW.CZ

Hi,
 
        I think your problem come from the 'execute' function.  The
call execute tries to resolve the macro BEFORE passing the text to SAS,
but you're already in a datastep and your macro have to call a datastep
wich is going to be executed next to resolve the value of XXX.  So, in
short, you're asking SAS to show you a value it has not yet obtained !
 
        If you look carefully in the SAS online documentation about the
execute function, you will notice this ...
 
        Another way to get this type of comflict is to mix '%let' and
'%include' with call execute function.  The '%let' will be resolved immediatly,
but the '%include' will be executed after:  so you will have many %include
with the last value of the variable you set in the '%let'...
 
        I hope it clarifies the matter!
 
                Regards,
                        Bernard Tremblay
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>Date:         Tue, 21 Jul 1998 15:51:42 +0200
>>>From: Zdenek Seidl <SeidlZ@TESCOSW.CZ>
>>>Subject:      Local macro variables
>>>To: SAS-L@UGA.CC.UGA.EDU
>>>
>>>Hello
>>>I'm young sw developer from czech republic and this is my first
>>>message i'm sending to this mailing list, so please don't leave
>>>it without answer.
>>>
>>>I've such problem: I need to write macro, which uses local macro
>>>some local macro variables. This is not the problem, the problem
>>>comes, as i try to call this macro by using 'call execute' statement.
>>>See example below ...
>>>
>>>%macro sample;
>>>   %local xxx;
>>>   data _null_;
>>>      call symput("xxx","TEST");
>>>   run;
>>>   %put _all_;
>>>%mend sample;
>>>
>>>When I call this macro by
>>>
>>>%sample;
>>>
>>>everything is ok and in the log window is displayed macro variable xxx
>>>with scope 'sample' and value 'TEST'. But when i call this macro by
>>>
>>>data _null_;
>>>   call execute('%sample;');
>>>run;
>>>
>>>then the macro variable xxx is not filled and the message log stays
>>>clear.
>>>I've verified, that the macro variable xxx is not set to any value in
>>>this case.
>>>
>>>WHAT'S WRONG ???? Is it impossible to use local macro variables
>>>when calling macros by using 'call execute' ???
>>>
>>>Please, if you know the answer, let me know. It is very important for
>>>me.
>>>
>>>Thanx
>>>        Zdenek Seidl
>>>
>>>PS: Excuse my poor english ;)