Crystal reports, sub-reports, and shared variables

Question

I have a formula @InitVars in the page header which includes the following, and similar lines:

shared numbervar runWaste:=0;

In Details v, I have a sub-report, which has a formula @SetRunWaste:

shared numbervar runWaste;
if (OnFirstRecord) then
(
if not(isnull({x.x-or})) and 
not(isnull({x.y-override})) and {x.y-override} = true then
runWaste:={x.x-or} 
  else
runWaste:= {x.x}
);
runWaste

I can see the output of this formula in the sub-report is 18.00.

However, both in another sub-report, in Details az, and in the main report in Details w (as a test), I have the following formula @test:

shared numbervar runWaste;
runWaste;

In both places, it shows as 0.00.

Why is it showing 0 not 18?

I'm using Crystal Reports version 11.0.0.895.

Solution 1

The problem is that @InitVars is in the page header, not the report header. It is resetting the variable to 0 at the top of every page.

Moving @InitVars to the report header fixed it so the correct number comes up in the sub-report in Details az.

I still see some odd behavior when I include the variable in the main report, but since that was just for debugging, not the main target, I don't care.

Solution 2

I have a vague memory that I'm now having a hard time substantiating about shared variables not passing back up from a subreport. Still looking; good thing it's Friday afternoon.

Edit: I can't find what I was looking for, so a general thought. Check evaluation time, and make sure that the later section on the main report is evaluating after the subreport (WhilePrintingRecords might be your friend here).