%macro existmv (macrovar);
%* macrovar - name of macro variable to check for existence;
%* 0 if macro variable is not found in SASHELP.VMACRO;
%* 1 if macro variable is found in SASHELP.VMACRO;
%* -1 if an error occurred;
%* Richard A. DeVenezia 12/23/98;
%* Note: if option NOTES and the macro variable is not found in
%* SASHELP.VMACRO by the where clause of the open statement
%* there will be a note in the log
%* NOTE: No observations were selected from data set SASHELP.VMACRO.
%* There is currently no way to circumvent this.
%let dsid = %sysfunc (open (SASHELP.VMACRO (where=(name=upcase("¯ovar") and scope ne "EXISTMV"))));
%if &dsid %then %do;
%sysfunc (attrn (&dsid, ANY));
%let dsid = %sysfunc (close (&dsid));