Hello All,

I have created windows installer application, now when I upgrade the same I get following error “Another version of the product is already installed. Installation of this version cannot continue. To configure or remove the existing version ...use add remove program in control panel”.

I changed the version number but still I get the error.. I even tried changing the product code and set removepreviousversion property to true but still no luck.. can any one put some light to the same please??

One instance what happens is, if I try install my application through code (i.e open the solution in .net 2005 and try to install, it automatically removes older version and installs newer version) but if I directly click on windows installer package (MSI/setup) file I get the error. I checked the error log I have this message MsiInstallProduct returned '1638'.

It will be great help if any one puts some light on it. This is preety Urgent...

Thanks in Advance,