Crystal Report Add One Report Parameter = Missing Parameter Values

Hi

I have a report, that has 3 subreports, i only pass one parameter to the main report, and the subreports are associated with this parameter. Everything was working fine...

Now i need to change the report title at "runtime", so i created a new parameter "TitleChange" has boolean, and after that created a formula that checks the value of TItleChanged parameter, if true returns one string, if not returns another. After this just dragged the formula to the header of the main report.

In preview mode everything is working fine.

But when i set the new parameter by code it says "Missing parameter values" :(

I'm setting the parameters like this:

vb.net Code:

Rel.Load(Server.MapPath("~/Reports/MyReport.rpt"), CrystalDecisions.Shared.OpenReportMethod.OpenReportByTempCopy)
Rel.SetParameterValue("@ID", id) 
Rel.SetParameterValue("TitleChange", False)

If i remove the new parameter from the report, everything works fine again?!!?

What i'm missing here?!!

THanks

It's been some time since I've dealt with CR ... but... as a first guess... there's a difference in the parameter names:
Rel.SetParameterValue("@ID", id) <---- works
Rel.SetParameterValue("TitleChange", False) <--- guessing this doesn't work.


Could that be the issue?

-tg

Already tested that, same problem

Finally i isolated the problem...

First in two of the three subreports, the data comes from stored procedures each one of them has 2 input parameteres, where one it's optional, if i don't pass anything they're null by default for both SPs.
The other parameter is related to the the ID parameter, like i said before.
So i have 2 paths, if I remove the Report Parameter that i need for the title, the report works fine, if I add the parameter, the report complains about missing values...

So the only way that i see to solve this, is by setting the value for the optional parameters, but when i try to set it to DBNULL.VALUE or NOTHING/NULL, it complains about incompatible types.
I tried in the formula editor to create a simple formula to return a NULL value, and then use this formula to link to the subreport, but i don't know how to or if it's even possible.

Thanks

I didn't found out how to send the NULL value, but in this specific case i can send 0 that's the same thing...
So this how:

vb.net Code:

'Set the subreports vars
Rel.SetParameterValue("@IDPEs", "0", "SubReportOne.rpt")
Rel.SetParameterValue("@IDPEs", "0", "SubReportTwo.rpt")

But if anyone can tell me how to set to NULL the parameters, feel free to share how.

Thanks

Have you tried the HasValue() function that checks for values in Optional Parameters in the Crystal designer?