what does MSI do to prevent an older version of a program from being installed over a newer one? how does this work? how does the older version know that a newer version is present on the machine?
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installing older version of software
Started by
dtasanas
, Oct 13 2004 23:52
2 replies to this topic
dtasanas
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Posted 13 October 2004 - 23:52
Don Tasanasanta[br]Configuration/Installation Eng
Glytzhkof
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Posted 14 October 2004 - 13:22
There is a way you can use the upgrade table to prevent an older version to overwrite a newer version. Check the topic "How do I prevent an old package from installing over a newer version?" in the Windows Installer SDK.
Regards
-Stein Åsmul
-Stein Åsmul
Penseleit
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Posted 13 December 2004 - 21:27
FYI
I followed these instructions from the Windows Installer SDK and it worked for me...
Add another row to your Upgrade table:
The entries you need are:
Upgrade code: <Upgrade GUID>
Version min: <Current Version>
Version max: Blank
Attributes: 2
ActionProperty: DOWNGRADE
Tip: Don't enter your DOWNGRADE Property into the Property table but DO enter your DOWNGRADE property into the SecureCustomProperties table.
Next enter a Custom Action type 19 with a message to your liking.
Action: DOWNGRADE_Message
Type: 19
Source:
Target: This upgrade cannot continue. An newer version of the product is already installed.
Place the Custom Action after the FindRelatedProduicts Action in both theInstallExecuteSequence and InstallUISequence tables.
If a previous version of a product is detected, a message is displayed and the installer exits - works for silent installs as well.
I followed these instructions from the Windows Installer SDK and it worked for me...
Add another row to your Upgrade table:
The entries you need are:
Upgrade code: <Upgrade GUID>
Version min: <Current Version>
Version max: Blank
Attributes: 2
ActionProperty: DOWNGRADE
Tip: Don't enter your DOWNGRADE Property into the Property table but DO enter your DOWNGRADE property into the SecureCustomProperties table.
Next enter a Custom Action type 19 with a message to your liking.
Action: DOWNGRADE_Message
Type: 19
Source:
Target: This upgrade cannot continue. An newer version of the product is already installed.
Place the Custom Action after the FindRelatedProduicts Action in both theInstallExecuteSequence and InstallUISequence tables.
If a previous version of a product is detected, a message is displayed and the installer exits - works for silent installs as well.
Edited by Penseleit, 13 December 2004 - 22:10.