Deployment error (the install keeps rolling back)

I have built a setup project to deploy a migration utility that migrates a clients data up to SQL Server. When you run the install, I install the files then launch the app to migrate the data after the app is done it shuts down then the finish screen is suppose to display.

Problem: When the app completes, it shuts down and then the install is suppose to go to the finish screen but it errors out and gives me a generic msg "There is a problem with the install" then rolls back the entire process.

I have built the entire solution in both debug and release mode and that did not make a difference. I have also created a custom action in the install section and the commit section (when to launch the app during the install) and neither one made a difference either. I am unable to trap the error, so I have no clue what is causing it.

Does anyone have any idea what may be causing this error? The migration application runs approximately for about 8 minutes. Would it have anything to do with the legnth of the migration process?

Cant you try it on another machine to see if it still faces error?

yeah, I gave it to a user to test it and it happened to them. Its weird, I ran it twice on my machine last night and it worked fine. When the user ran it the first time she said it worked. She then wanted to try it again, so she uninstalled it then re-installed it and it failed.

Cant you let the users run the program when the installation finishes, just like normal setups, and do not launch the application during setup to isolate the problem?

yeah, I may be forced to do that. I was just trying to automate the entire process.

Hi, are u using any transactions while uploading the dat is yes then I think whats happening here is that the transactions are interfering with each other or u can say there is is clash in transactions of ur app and installer, it could also be due to a simple reason like there is some dll giving an error (thats why ur tester was able to install it first time but on second attempt it failed) it will be better if u segregate ur installer and app.

No transactions are being used. What do you mean segregate the app from the intaller?

i meant first let the installation be completed then launch ur app not while setup is running.

How would I be able to launch the app when the setup is done?
Right now I am launching the app during the install.

If the setup is complete how is that possible?