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mjanulaitis1234
Level 4
‎Nov 24, 2010 11:09 PM

How to stop 32-bit installer from over installing 64-bit version

I've got 2 install projects for the same product. Right now they have the same product code, although I can change them if I need to. My question is this. How do I stop the 32-bit version from over installing the 64-bit version and possibly vis-a-versa? I think I want, however; the 64-bit version to uninstall the 32-bit version if found. Seems the later is easy as I can just change my product code.
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Christoph
Level 8
‎Nov 25, 2010 09:11 AM

make unique productcodes(as updatecode and packagecode) and fill the upgrade table to detect the 32-Bit product and visa versa.
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Videstra
Level 7
‎Dec 01, 2010 05:51 AM

We have both 32 bit and 64 bit versions of the same application - which sounds like what you have. We prevent this by only allowing the 32 bit version to install on 32 bit system, not on 64 bit systems. Since a 64 bit installer will not even run on a 32 bit system we don't have to worry about that.
So - to prevent a 32 bit installer from installing on a 64 bit system I wrote a small, but simple Custom Action in VBS (Stored in binary table).


Option Explicit
'this custom action is designed to determine if the OS is 32 or 64 bit.   It is meant to be included ONLY in 32 bit
'installs to warn the user when an actual 64-bit version of the application is available

Const IDABORT = 3
Const IDSUCCESS = 0

Dim strCaption

'AmI64Bit

Function AmI64Bit()
 		
	StrCaption = "32-bit OS"
	On Error Resume Next
	  	strCaption = GetObject("winmgmts:win32_OperatingSystem=@").OSArchitecture
	On Error GoTo 0
	If (InStr(strCaption, "64") > 0) Then
	  
		MsgBox "You are trying to install a 32 bit application onto a 64 Bit Operating System" & vbcrlf & _
	     		      "A 64-Bit version of this application is available." & vbcrlf & vbcrlf & _
	        		  "Please contact Customer Service for the 64 bit version of this application", vbOkOnly
		AmI64Bit = IDABORT
	  
	Else
	  
		AmI64Bit = IDSUCCESS
		'Call MsgBox(strCaption)
	  
	End if
	

End Function


This CA is placed in the 32 bit installer early in the process.
If this returns IDABORT then the CA will cause the installer to abort gracefully.

If you allow users to install 32 bit program on a 64 bit system when a 64 bit version is available then I think it just gets complicated...
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