Unable to index into an object of type System.ServiceProcess.ServiceController

Hello,

if I have executed the script on a server which run two instances SQL SERVER, no error message is returned
 $LIST_INST = (Get-Service -Name "MSSQL*" -Exclude "*Launcher*","*AD*")
foreach ($INST in $LIST_INST) {

      if ($CLUSSVC -eq $null -or $SCMODE -eq 'AUTO') {

        $INST_NAME = $INST.Name.REPLACE("MSSQL$","")
      }

      else {

        $INST_NAME = $INST.Name.REPLACE("SQL Server (","")
        $INST_NAME = $INST_NAME.REPLACE(")","")
        $CSERVICES = Get-WmiObject -Class win32_service -ComputerName $HOSTNAME | where { $_.Name -match "$INST_NAME" -and $_.Name -match 'MSSQLF' -or $_.Name -eq 'SQLBrowser' -or $_.Name -eq 'SQLWriter' }

      }
      $REGPATH = (Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Microsoft SQL Server\Instance Names\SQL").$INST_NAME
      $key_name = "HKLM:\SOFTWARE\Microsoft\Microsoft SQL Server\" + $REGPATH + "\Cluster"
      $key_prop = Get-ItemProperty -Path $key_name -ErrorAction silentlycontinue
      $FULLPATH = "HKLM:\SOFTWARE\Microsoft\Microsoft SQL Server\$REGPATH"
      $SQLROOT = (Get-ItemProperty "$fullpath\Setup").SQLDataRoot

      if ($key_prop -eq $null) {
        $ser_name = (Get-WmiObject Win32_Computersystem).Name
      }
      else {
        $ser_name = $key_prop.ClusterName
      }

      $server = $SER_NAME + '\' + $INST_NAME
      if ($inst_name -eq "MSSQLSERVER") {
        $server = $ser_name
    
      }

if ($INST -ne $LIST_INST[-1]) {
                $line_FG = " { `"{#DBHOST}`":`"" + $HOSTNAME + "`" , `"{#INSTANCE}`":`"" + $INST_NAME + "`" , `"{#DBSPACE}`":`"" + $DBSPACE + "`"},"

              }

              else {
                $line_FG = " { `"{#DBHOST}`":`"" + "(" + $HOSTNAME + ")" + $SER_NAME + "`" ,`"{#INSTANCE}`":`"" + $INST_NAME + "`" , `"{#DBSPACE}`":`"" + $DBSPACE + "`"},"

              }
             
	      if ($INST -eq $LIST_INST[-1]) {
	      $line_FG = " { `"{#DBHOST}`":`"" + $HOSTNAME + "`" , `"{#INSTANCE}`":`"" + $INST_NAME + "`" , `"{#DBSPACE}`":`"" + $DBSPACE + "`"}"
	      if ($i -lt $nb_FG_DB-1 -or $j -lt $nb_FG-1) { $line_FG += ',' } 

              }
          
  
           Write-Host $line_FG

}

Open in new window

But if I have executed the script on a server which run only one instance SQL SERVER, the following erreor message is returned

Unable to index into an object of type System.ServiceProcess.ServiceController.

+               if ($INST -ne $LIST_INST[ <<<< -1]) {
    + CategoryInfo          : InvalidOperation: (-1:Int32) [], ParentContainsErro
    + FullyQualifiedErrorId : CannotIndex
Thanks
bibi92Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

footechCommented:
Try changing the first line to the following:
$LIST_INST = @(Get-Service -Name "MSSQL*" -Exclude "*Launcher*","*AD*")

Open in new window

By way of explanation, this forces $LIST_INST to always be an array, even if it's just an array of one, then you can index into it.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
bibi92Author Commented:
Thanks
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Powershell

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.