Hi,

I'm facing some issues when trying to loop the execution of my custom dialogs. 
To be very specific, here is the sequence which I need to follow :

LicenseDlg -> SharePointversionDlg -> SharePointWebAppPortDlg -> Initiates 
Spawn dialog on certain condition -> PortNotAvailableDlg

>From this SpawnDialog "PortNotAvailableDlg", I've two options :


1.       Click Next To Navigate to next Custom Dialog and that is 
"SharePointAdminSetupDlg"

2.       Click Back To Return to the dialog "SharePointWebAppPortDlg"

If I move ahead by clicking on Next Button of this SpawnDialog, it moves to the 
next custom dialog as I've published it on Next Button Click. But when I click 
on "Back" Button of this navigated Custom Dialog (SharePointAdminSetupDlg) it 
breaks the MSI with following exception :

DEBUG: Error 2856:  Creating a second copy of the dialog SharePointWebAppPortDlg
The installer has encountered an unexpected error installing this package. This 
may indicate a problem with this package. The error code is 2856. The arguments 
are: SharePointWebAppPortDlg, ,
MSI (c) (0C:C4) [14:56:08:859]: Product: -- The installer has encountered an 
unexpected error installing this package. This may indicate a problem with this 
package. The error code is 2856. The arguments are: SharePointWebAppPortDlg, ,

My prime suspect is these wizards are arranged in sequential manner, so needs 
to be backward compatible. If we skip any of the dialog and try to jump to its 
previous dialogs, it will fail as ControlEventTable entry fetched is out of 
sync.

Is it possible to customize this sequencing as per our business need ? Or is it 
possible to customize a portion of this sequencing and rest of the sequencing 
can be bi-directional ?

Thanks,

Vishwajit

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