Shared DateVar in Subreport and datediff calculation in Main Report?

Question

Hello experts,
I am using CRXI sp2.  I have a report that contains two subreports for different dates in the same date field that are identified by a Service Code.  The subreports have been placed in the same group footer 1a to be displayed and the calculation resides in the main report group footer 1b.  The shared variables are as follows:
whileprintingrecords;
shared datevar Codedate5473;
Codedate5473:={@Codedate5473};
and
whileprintingrecords;
shared Datevar Codedate5623;
Codedate5623:={@Codedate5623}
The main report has the following calculation is in group footer 1a.
Whileprintingrecords;
Shared numbervar daysbetween;
if (isnull({@Shared 5623})or isnull({@Shared 5473})) then 0
else daysbetween:= datediff("d",{@Shared 5623},{@Shared 5473})
This returns negative numbers as well as calculations where one of the shared variables is null.
I reset the calculation in the report header as well.
Thanks for your help in advance.
Kevin

Answer 1

Hi Kevin,
I can reproduce your issue, As per my knowledge the crystal will make some issues in null value computation as well as  shared variable  computation
In your report i can see , you tried to access values from subreport to main report through shared variable. that will make problem. we can access values from main report to subreport without any issue using shared..dont ask me the reason..i am not the right person to say that... lol.
The another wrong thing  i was found in your formula is , you are not resetting the shared variable any where.. so once the date field is null, the shared variable returning the previous value.
So this is the solution for you..
1,You have to add one more subreport for displaying your result., Lets say 'Sub report3'
and create a formula, like.(Same which you have write before for the result)
shared datevar Codedate5473;
shared Datevar Codedate5623;
numbervar daysbetween;
WhilePrintingRecords;
daysbetween:= datediff("d",Codedate5473,Codedate5623);
daysbetween;
2, Re- write your first two formulas like this
For Subreport1,
WhilePrintingRecords;
shared dateVar Codedate5473;
if isnull({Codedate5473}) then
Codedate5473:=date(0,0,0)
else
Codedate5473:=date({Codedate5473});
For subreport2
WhilePrintingRecords;
shared dateVar Codedate5623;
if isnull({Codedate5623}) then
Codedate5623:=date(0,0,0)
else
Codedate5623:=date({Codedate5623});
Hope this will works for you,
Cheers,
Salah.
Edited by: salahudheen muhammed on Aug 7, 2009 1:05 PM