Why doesn't my macro variable resolve in this code?

[VinnyR]

options mlogic mprint symbolgen;

%macro visit(indata=, visit=);

data datafile;
set &indata.(where=(visit_="&visit."));
diffm1m2=day1-day2;
meanm1m2=mean(day1,day2);
run;

proc means data=datafile mean std noprint;
by visit_;
var diffm1m2;
output out=mdiff mean=mdiffm1m2 std=sddiffm1m2;
run;

data datafile2_1 datafile2_2 datafile2_3;
if _n_=1 then set mdiff;
set datafile;
drop _freq_ _type_;
newcol=mdiffm1m2;output datafile2_1;
lldiffm1m22=mdiffm1m2-(1.96*sddiffm1m2); newcol=lldiffm1m22;output datafile2_2;
uldiffm1m22=mdiffm1m2+(1.96*sddiffm1m2);newcol=uldiffm1m22;output datafile2_3;
run;

data datafile2;
  set datafile2_1 datafile2_2 datafile2_3;
run;

options nonumber nodate;

title1 j=c %if visit_ ne "" %then %do; 'Bland-Altman Plot for Day 1 and Day 2 observed values at &visit.'; %end;
          %else %do; "Bland-Altman Plot for Day 1 and Day 2 observed values"; %end;
title2 j=c "Efficacy Set";
footnote1 " ";

ods graphics / reset width=1200px height=700px imagename='Full' ;
ods listing close; 
ods escapechar='~';
ODS rtf FILE = "&outpath.&output..rtf";
symbol value=dot interpol=join repeat=100;


proc sgplot data=datafile2;
scatter x=meanm1m2 y=diffm1m2/ markerattrs=(color=green);
refline lldiffm1m22 / axis=y lineattrs=(color=red pattern=4 thickness=2pt);
refline mdiffm1m2/ axis=y lineattrs=(color=blue thickness=2pt);
refline uldiffm1m22/ axis=y lineattrs=(color=red pattern=4 thickness=2pt);
yaxis label='Day 1 - Day 2' labelattrs=(style=normal );
xaxis label='Mean of Day 1 and Day 2';
run;

ods rtf close; 
ods listing;

%mend;

%visit(indata=all1, visit=Baseline);

Hi , why is my code not resolving for macro variable in the title statement? attached is the code as well as excerpt of the sas log.

[novinosrin · Accepted solution]

enclose this in double quotes

"Bland-Altman Plot for Day 1 and Day 2 observed values at &visit.";

In your existing code, the macro variable visit do not resolve in a literal that's enclosed with single quotes 

[VinnyR]

Thanks, that was quickfix.

Really appreciate your help