I have tried both ISD 2010 (and double cheked with #12 ) and any try to use the XML editor for installed files, causes installation failure. following is acopy from the Msi log:
InstallShield 19:57:46: Installing 1 XML component(s) InstallShield 19:57:46: Installing XML Component 'MyFile.exe.config' InstallShield 19:57:46: Installing XML file 'C:\Program Files\My Company Name\My Product Name\MyFile.exe.config' Action 19:57:46: Progress Custom Action. Updating XML file C:\Program Files\My Company Name\My Product Name\MyFile.exe.config... InstallShield 19:57:46: Using MSXML version 6 InstallShield 19:57:47: Processing XPath '//common.Pools/add[@key="ByteBuffer.InitialSize" and @value="500"]' Action ended 19:57:47: InstallFinalize. Return value 3. MSI (s) (48:44) [19:57:47:343]: User policy value 'DisableRollback' is 0 MSI (s) (48:44) [19:57:47:343]: Machine policy value 'DisableRollback' is 0 MSI (s) (48:44) [19:57:47:375]: Executing op: Header(Signature=1397708873,Version=405,Timestamp=990224183,LangId=1033,Platform=0,ScriptType=2,ScriptMajorVersion=21,ScriptMinorVersion=4,ScriptAttributes=1) MSI (s) (48:44) [19:57:47:375]: Executing op: DialogInfo(Type=0,Argument=1033) MSI (s) (48:44) [19:57:47:375]: Executing op: DialogInfo(Type=1,Argument=My Project Name-4) MSI (s) (48:44) [19:57:47:375]: Executing op: RollbackInfo(,RollbackAction=Rollback,RollbackDescription=Rolling back action:,RollbackTemplate=[1],CleanupAction=RollbackCleanup,CleanupDescription=Removing backup files,CleanupTemplate=File: [1]) Action 19:57:47: Rollback. Rolling back action: Rollback: ISXmlInstall
Can you post the XML file you're using? I've found the XML editor to be extremely fragile...though I haven't seen a rollback myself. Also, perhaps a relevant screenshot of your XML Changes view that the XPath is related to.
Do you have write permissions to C:\Program Files\My Company Name\My Product Name\? In the newer OS, I believe MS was trying to move people away from that and use the profile folders instead so certain things weren't writeable.
I've had no problems updating XML files in any of the new OS even with UAC enabled. On my installers ISXMLinstall is set to "Deferred Execution in System Context", and due to other issues with our app I run icalcs as well to grant write (you may not need this for XML updates though.)
