On 26/10/2008 9:50 AM, Erich Neuwirth wrote:
I just uninstalled R 2.7.2 on Windows XP after having installed R 2.8.0
The uninstaller removed the String values
HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\Current Version
HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\InstallPath
despite the fact that they pointed to R 2.8.0
The uninstaller did not remove the key
HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\2.7.2
(and all the values in that key)
I think the uninstaller should only remove the Current Version entry
if it points to its own version.
In a second attempt, the 2.7.2 uninstaller removed the key
HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\2.7.2
(which is what it should do)
but it still removed the
HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\Current Version
HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\InstallPath
values. It should not have removed these keys.
Sometimes this does not happen, and I have not found a consistent
explanation when it happens and when not.
Sometimes also running RSetReg.exe creates a second entry like
HKEY_LOCAL_MACHINE\SOFTWARE\R-core\R\2.7.2
which has identical content with the first one.
The registry really looks like having 2 identical entries.
Is this something which I should file as a bug?
The deletions look like a bug, but probably not one that will get fixed
by us. All of the registry entry removals are handled by the Inno Setup
installer. It has options to delete, or to delete if empty, but no
option to delete if unchanged. So our only workaround would be not to
delete at all. Now maybe that should be the option for Current Version
and InstallPath; do you think so?
The duplicate entry also appears to be a bug, but if it's not
reproducible, I wouldn't want to try to track it down. Registry keys
are supposed to be unique, so maybe this is a Windows bug. You might
want to export both keys to a file, and do a careful compare there.
Duncan Murdoch
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