Rob Mensching-7 wrote
> Why doesn't that work today?

@Rob : I don't know why it doesn't work, but i made some experiments and can
confirm *THAT*it doesnt work in 3.9R2. : If i try to downgrade a bundle, a
message pops up telling that a higher version of the bundle is already
installed:

<http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/file/n7600024/Unbenannt.png>
 

However, having read some discussions and reasoning myself a bit about this
issue, i think that this behaviour is 'works as designed' and is not too
bad. By default, you also cannot downgrade a 'plain' MSI, and there are some
good reasons for this default behaviour, as i learned meanwhile. You /CAN
/build a downgradable MSI, but this gives you an ICE warning. If a bundle
containing a chain of MSIs allowed downgrading, this could in generally only
work if all contained MSIs were also downgradable. If some of them were not,
the downgrade would fail under some conditions, and sometimes not - could be
quite confusing to the end user.

On the other hand, if an end user desperately wants to downgrade with the
current implementation, she has always the option to first uninstall the
bundle (as advised in the error message), and then reinstall the older
version. From my point of view, that's sufficient and pretty clear.

regards , Martin




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