Have you tried using a Property with its value set to "MSSQLSERVER" as I first assumed you were doing? Even something as simple as <Property Id="MSSQLSERVER" Value="MSSQLSERVER" /> added to your first code fragment might cause this to work.
Essentially your code is doing exactly what you're trying to achieve from how I understand it but a quirk of Windows Installer could be fooling both of us and the above might be the solution. Palbinder Sandher Software Deployment & IT Administrator T: +44 (0) 141 945 8500 F: +44 (0) 141 945 8501 http://www.iesve.com **Design, Simulate + Innovate with the <Virtual Environment>** Integrated Environmental Solutions Limited. Registered in Scotland No. SC151456 Registered Office - Helix Building, West Of Scotland Science Park, Glasgow G20 0SP Email Disclaimer -----Original Message----- From: Dominique Louis [mailto:dominique.lo...@amxeurope.com] Sent: 14 September 2009 14:23 To: General discussion for Windows Installer XML toolset. Subject: Re: [WiX-users] Conditional installed based on REG_MULTI_SZ value Hi Pally, Thanks for taking the time to answer my query. I should have mentioned that I had already tried putting quotes around MSSQLSERVER, but that does not work either. What I need is some kind of conditional code the does the equivalent of a "Does this SQLSERVER property *contain* MSSQLSERVER" Dominique. -----Original Message----- From: Pally Sandher [mailto:pally.sand...@iesve.com] Sent: 14 September 2009 13:15 To: General discussion for Windows Installer XML toolset. Subject: Re: [WiX-users] Conditional installed based on REG_MULTI_SZ value <Condition Message="This application requires Microsoft SQL Server. Please install Microsoft SQL Server then run this installer again."> <![CDATA[Installed OR (SQLSERVER><MSSQLSERVER)]]> </Condition> That says to throw the condition 'If the Property SQLSERVER does not contain the Property MSSQLSERVER or the product is not already Installed' Try putting quotes around MSSQLSERVER if you want it to be a string rather than a Property. I may be wrong but that's how I understand it. See http://msdn.microsoft.com/en-us/library/aa368012.aspx Palbinder Sandher Software Deployment & IT Administrator T: +44 (0) 141 945 8500 F: +44 (0) 141 945 8501 http://www.iesve.com **Design, Simulate + Innovate with the <Virtual Environment>** Integrated Environmental Solutions Limited. Registered in Scotland No. SC151456 Registered Office - Helix Building, West Of Scotland Science Park, Glasgow G20 0SP Email Disclaimer -----Original Message----- From: Dominique Louis [mailto:dominique.lo...@amxeurope.com] Sent: 14 September 2009 12:48 To: General discussion for Windows Installer XML toolset. Subject: Re: [WiX-users] Conditional installed based on REG_MULTI_SZ value MSSQLSERVER Is not a property, it is a literal string that should exist within the Registry. I'm essentially trying to check if 'MSSQLSERVER' exists within the multi-string SQLSERVER. -----Original Message----- From: Pally Sandher [mailto:pally.sand...@iesve.com] Sent: 14 September 2009 12:36 To: General discussion for Windows Installer XML toolset. Subject: Re: [WiX-users] Conditional installed based on REG_MULTI_SZ value What is the property MSSQLSERVER set to? You appear to have omitted this from your code fragment. Palbinder Sandher Software Deployment & IT Administrator T: +44 (0) 141 945 8500 F: +44 (0) 141 945 8501 http://www.iesve.com **Design, Simulate + Innovate with the <Virtual Environment>** Integrated Environmental Solutions Limited. Registered in Scotland No. SC151456 Registered Office - Helix Building, West Of Scotland Science Park, Glasgow G20 0SP Email Disclaimer -----Original Message----- From: Dominique Louis [mailto:dominique.lo...@amxeurope.com] Sent: 14 September 2009 11:29 To: wix-users@lists.sourceforge.net Subject: [WiX-users] Conditional installed based on REG_MULTI_SZ value Hi WiX gurus, I'm using the "supposed" standard way of detecting multiple SQLServer instances... <Property Id="SQLSERVER"> <RegistrySearch Id="SQLServer" Root="HKLM" Key="SOFTWARE\Microsoft\Microsoft SQL Server" Type="raw" Name="InstalledInstances"/> </Property> <Condition Message="This application requires Microsoft SQL Server. Please install Microsoft SQL Server then run this installer again."> <![CDATA[Installed OR (SQLSERVER><MSSQLSERVER)]]> </Condition> But the Condition... <![CDATA[Installed OR (SQLSERVER><MSSQLSERVER)]]> Does not evaluate correctly. For instance if the Property SQLSERVER only contains "[~]SQLEXPRESS[~]" ( according to the log ) It still allows the installation to proceed when it should not, so I'm not convinced that using the >< is the correct way to check if 1 value exists within a REG_MULTI_SZ variable. Can anyone enlighten me as to what I may be doing wrong. Also where can I find the correct documentation/list to find out what are the correct conditional operatives I can use within a Condition statement in WiX, preferably with examples. I Googled various sites, but nothing definitive or helpful. Thanks. Dominique. 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