WiX Duplicate Version Product Installed

I crea开发者_StackOverflow中文版ted a MSI "appA.msi" with WiX 3.5 and have discrete GUIDs in the .wxs file for

Product Id
UpdgradeCode
Package Id

I do not have any component GUIDs specified.

It installs like this:

...program files...
.....homedir
.......launcher.exe
.........appdirA
...........app.exe
...........app.exe.config

I then built another MSI with the same project called "appB.msi", all bits the saedited the app.exe.config file, changed the GUIDs for

Product Id
UpdgradeCode
Package Id

And I expected it to install like this:

...program files...
.....homedir
.......launcher.exe
.........appdirB
...........app.exe
...........app.exe.config

(yes launcher.exe is the same file going in the same spot)

But instead of installing, I get the message "Another version of this product is already installed."

But AFAIK the versions are completely different, right?

Thanks.

Generally speaking you are best off using the ?????-??? format for the package code and for the product code rather than using a static one that you have to keep editing.

Not setting the component GUIDs means the components will be orphaned on the system.

Do you need these two packages to co-exist or should they be mututally exclusive. Depending on the answer you may need to put a little more work into them.