How to fix the null index array error in powershell?

Question

I am trying to run a PowerShell script which is taking three input PAT, organization and connection string of the database. But, When I run the script I am facing an issue i.e it throws a null index array. Attaching screenshot of the error and script for reference. Any help will be appreciated.

script as below:

Param
(
    [string]$PAT,
    [string]$Organization,
    [string]$Connstr
)

Get-Date
Import-Module SqlServer

$LogDate = (Get-Date).tostring("yyyyMMddHHmmss")
$LogFile = $PSScriptRoot + "\" + $LogDate + ".log"

#Create LogFile Header
& .\LogFile.ps1 -LogFile $LogFile -Message "Starting Azure DevOps data extraction..."

$sqlcc = New-Object -TypeName System.Data.SqlClient.SqlConnection -ArgumentList $Connstr
$sc = New-Object -TypeName Microsoft.SqlServer.Management.Common.ServerConnection -ArgumentList $sqlcc
$srv = New-Object -TypeName Microsoft.SqlServer.Management.Smo.Server -ArgumentList $sc
$db = $srv.Databases["azuredevopsreports"]

$AzureDevOpsAuthenicationHeader = @{Authorization = 'Basic ' + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(":$($PAT)")) } + @{"Content-Type"="application/json"; "Accept"="application/json"}
$UriOrganization = "https://dev.azure.com/$($Organization)/"

#INSERT FeedPackageVersions
& .\FeedPackageVersions.ps1 -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -LogFile $LogFile

#INSERT InstalledExtensions
& .\Extensions.ps1 -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -LogFile $LogFile

#INSERT Users and UsersGroups
& .\Users.ps1 -PAT $PAT -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -LogFile $LogFile

$table = $db.Tables["Processes"]

#INSERT Processess
$uriProcess = $UriOrganization + "_apis/work/processes?`$expand=projects"
$ProcessResult = Invoke-RestMethod -Uri $uriProcess -Method get -Headers $AzureDevOpsAuthenicationHeader
Foreach ($process in $ProcessResult.value)
{
    $Processes = New-Object 'Collections.Generic.List[pscustomobject]'
    $processObject = [PSCustomObject] [ordered]@{
        ProcessTypeId=$process.typeId
	    ProcessName=$process.name
	    ProcessReferenceName=$process.referenceName
	    ProcessCustomizationType=$process.customizationType
    }
    $Processes.Add($processObject)
    Write-SqlTableData -InputData $Processes -InputObject $table
    & .\LogFile.ps1 -LogFile $LogFile -Message "Inserting Process Template: $($process.name) on table Processes"

    #INSERT ProcessesWorkItemsFields
    & .\ProcessesWorkItemsFields.ps1 -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -processtypeId $process.typeId -processName $process.name -LogFile $LogFile
    
    Foreach ($project in $process.projects)
    {
        #INSERT Projects
        & .\Projects.ps1 -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -projectId $project.id -projectName $project.name -processtypeId $process.typeId -LogFile $LogFile

        #INSERT Teams
        & .\Teams.ps1 -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -projectId $project.id -projectName $project.name -LogFile $LogFile

        #INSERT Repositories
        & .\Repos.ps1 -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -projectId $project.id -projectName $project.name -LogFile $LogFile

        #INSERT EnvironmentsApprovalsChecks
        & .\EnvironmentsApprovalsChecks.ps1 -AzureDevOpsAuthenicationHeader $AzureDevOpsAuthenicationHeader -Organization $Organization -db $db -projectId $project.id -projectName $project.name -LogFile $LogFile
    }
}

Get-Date
#Create LogFile Footer
& .\LogFile.ps1 -LogFile $LogFile -Message "Finishing Azure DevOps data extraction..."
7030300400

Answer 1

Thank you for reaching out to Microsoft Q&A

The error message you provided indicates that you are trying to access an index that is out of bounds for the array. This typically occurs when you are trying to access an array element using an index that is greater than or equal to the length of the array.

Here's a suggestion to debug the issue:

1. Check the length of the array to make sure it's not empty. If it's empty, make sure you are correctly initializing the array with values.

if ($array.Length -eq 0) {
    Write-Output "Array is empty."
}

2.Check the value of the index you are trying to access to make sure it's within the bounds of the array.
if ($index -lt 0 -or $index -ge $array.Length) {
    Write-Output "Index is out of bounds."
}

By adding these checks, you should be able to determine the cause of the error and fix it.
If you could share the relevant portion of the script, it would be easier for me to provide a more specific solution.

Answer 2

Are you sure that the error wasn't "Cannot index into a null array"?

[array]$x =$null
if ($null -eq $x){
    Write-Host "Array is null"
}
else{
    Write-Host "Array has $($x.length) elements"
}