On Apr 6, 2008, at 05:50, Tom Allison wrote:

sudo port -u upgrade outdated
Password:
--->  Activating apr 1.2.12_1
Error: Activating apr 1.2.12_1 failed: Image error: Another version of this port (apr @1.2.11_0) is already active.

This is the kind up upgrade problems I run into.
I manually deactivate/activate the packages?

Other ports probably depend on apr. Therefore, asking port to uninstall apr will fail. "port -u upgrade" means "port upgrade" and then "port uninstall" therefore you'll run into the error.

Since you're upgrading to a new version of apr, uninstalling the old one is fine. MacPorts just doesn't know that. So you have to tell it, by forcing the uninstall of the old version:

sudo port -f uninstall apr @1.2.11_0
sudo port activate apr @1.2.12_1


In the future, here's some pseudocode for a nice way to upgrade all your ports and uninstall the old versions:

while there exist an outdated port
do
        let foo be an outdated port
        sudo port upgrade foo
loop
sudo port -f uninstall inactive

Thanks to Emmanuel Hainry for this. See his suggestion here, and see the rest of the thread for other alternatives that don't work, and explanation of why this one does:

http://lists.macosforge.org/pipermail/macports-users/2007-October/ 005844.html

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