Scripting Question

VBScript to Uninstall any version of Java previously installed and then install the new version

01/14/2020 596 views

Hi Guys

I created the below script which works fine for the most part. It uninstalls any previous versions of Java and installs the new one as expected. The problem arises when I try to install the second package. I have two versions of this script. One for 32-bit and one for 64-bit. If I install one, it installs just fine but if I install the second package after the first one, in case someone wants both of them, then I get the below error.

Install.vbs(55, 6) WshShell.Run: Unable to wait for process.

I am running into this issue trying to avoid the uninstallation of the other package. If I install 32-bit first and then install 64-bit, I don't want the second package to uninstall the first one. Which is why on line 49, I am trying to make the script exit the subroutine but it's not exiting. and continues on to the next section of the subroutine and errors out.

If only one version was to be package, I would have been done. But I have to package both the 32 and 64 bit packages and I can't get the script to work the way I want.

The other option is to create a simple install and uninstall for both the packages and create a java cleaner to remove previous packages separately but i'd really like this to work.

Below is the script. Any help would be appreciated.

'Uninstalling Previous Versions

Const HKLM = &h80000002

Const SearchValue = "DisplayName"

Const MatchData   = "JAVA"

Set objShell = WScript.CreateObject("WScript.Shell")

Set reg = GetObject("winmgmts://./root/default:StdRegProv")

strProgramFiles = objShell.ExpandEnvironmentStrings("%ProgramFiles(x86)%" & "\")

If InStr(strProgramFiles,"%") Then

  StartKey = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"

  FindAppKey HKLM, StartKey, SearchValue, MatchData


  StartKey1 = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"

  StartKey2 = "SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall"

  FindAppKey HKLM, StartKey1, SearchValue, MatchData

  FindAppKey HKLM, StartKey2, SearchValue, MatchData

End If

'Install Java 8u221

Dim oShell, sDir, strCmd, sParam, sLogFile, sCom

sDir = CreateObject("Scripting.FileSystemObject").GetAbsolutePathName(".")

strCmd = "\jre-8u221-windows-x64.exe"

sParam= "/s /l"

sLogFile= "C:\Support\Java_v8u221_x64_Install.log"

sCom=(chr(34) & sDir & strCmd & chr(34)) & " " & sParam & " " & (chr(34) & sLogFile & chr(34))

wscript.echo "Running command " & sCom

Set oShell = CreateObject ("WScript.Shell")

oShell.Run sCom, 6, True

'Waiting for process to finish

Call WaitForProcess


Sub FindAppKey(root, key, value, data)

Dim CurrentVerx86, CurrentVerx64, CurrentVer

  reg.EnumValues HKLM, key, names, types

  If Not IsNull(names) Then

    For Each name In names


      If name = value Then

        reg.GetStringValue HKLM, key, name, regdata

strRegData = UCase(regdata)

CurrentVerx86 = "JAVA 8 UPDATE 221"

CurrentVerx64 = "JAVA 8 UPDATE 221 (64-BIT)"

      If InStr(strRegData, data) Then

  If StrComp(strRegData,CurrentVerx86) = 0 OR StrComp(strRegData,CurrentVerx64) = 0 Then

  Exit Sub


  wscript.echo "Exit Sub didn't work."

    reg.GetStringValue HKLM, key, "UninstallString", strPdtCode

    strUninstallString = strPdtCode & " /qn REBOOT=ReallySuppress"

    objShell.Run strUninstallString,0,True

  End If

        End If

      End If


  End If

  'value not found in current key => continue search in subkeys

  reg.EnumKey root, key, subkeys

  If Not IsNull(subkeys) Then

    For Each sk In subkeys

      FindAppKey root, key & "\" & sk, value, data


  End If

End Sub

'Waiting for process to finish

Sub WaitForProcess

Const PROCESSNAME = "jre-8u221-windows-i586.exe"

Set svc=getobject("winmgmts:root\cimv2")

sQuery="select * from win32_process where name='" & PROCESSNAME & "'"

Set cproc=svc.execquery(sQuery)


If iniproc=0 Then

    Set cproc=Nothing

    Set svc=Nothing


End If

Do While iniproc = 1

    wscript.sleep 5000

    Set svc=getobject("winmgmts:root\cimv2")

    sQuery="select * from win32_process where name='" & PROCESSNAME & "'"

    Set cproc=svc.execquery(sQuery)



Set cproc=Nothing

Set svc=Nothing

End Sub

0 Comments   [ + ] Show comments


All Answers

regardig "Unable to wait for process" error - Google is saying it happens e.g. when command starts with a space. I would suggest to display the full uninstallation command to verify it:
strUninstallString = strPdtCode & " /qn REBOOT=ReallySuppress"
Wscript.Echo "*" &strUninstallString &"*"

If there is a space, you can use the Trim function ---> strUninstallString = Trim(strPdtCode & " /qn REBOOT=ReallySuppress")

I would do exactly the same for the "Exit Sub" part. You already have there a Wscript.Echo. Why not to extend the message to know when exactly it goes to the ELSE part:

Wscript.Echo "Exit Sub didn't work."
Wscript.Echo "Comparing: *" &strRegData &"* with: *" &CurrentVerx86 &"* and *" &CurrentVerx64 &"*"
Wscript.Echo "StrComp x86 returned: " &StrComp(strRegData,CurrentVerx86)
Wscript.Echo "StrComp x64 returned: " &StrComp(strRegData,CurrentVerx64)

I belivie then you will figure out why it does not work as expected.

Answered 02/18/2020 by: rad33k
Fourth Degree Brown Belt

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