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Level 4

Installation should start in maintenance mode


We are using installshield 2008 "InstallScript" Project type to install our product. Now me moved to installshield 2010. I created a "InstallScript Msi" Project type in IS 2010 to install the same product on the client machine. The problem is these two projects have different product guids. So, when i try to install through my new installation, it starts as a fresh installation. But it should start in maintenance mode. We dont want the customer to uninstall the existing one and install the new one.

I tried to put the same product GUID for these two projects, but with no luck. Can someone help?
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Level 8

Is Maintenance support enabled in the project?
The old Product Guid should be used in the new project. This coupled with the maintenance support enabled should work fine.
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