Please help me fix this method invocation failed error.

Question

Please help me fix this method invocation failed error.

Sasi balaji 0

The code iam trying to run is :

$scriptDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path

$agentJobListFile = Join-Path -Path $scriptDirectory -ChildPath "AgentJobsList.txt"

$csvFilePath = Join-Path -Path $scriptDirectory -ChildPath "Veeamagent.csv"

function Check-FileExists {

param ([string]$filePath)

if (-not (Test-Path -Path $filePath)) {

    Write-Error "❌ The required file '$filePath' does not exist."

    exit 1

} else {

    Write-Host "✅ Found input file: $filePath"

}

}

Check-FileExists -filePath $agentJobListFile

$allAgentJobData = @()

$agentJobNames = Get-Content -Path $agentJobListFile

Write-Host "✅ Loaded $(($agentJobNames).Count) agent job names from AgentJobsList.txt"

foreach ($agentJobName in $agentJobNames) {

Write-Host "`n🚀 Processing agent job: $agentJobName"

$job = Get-VBRComputerBackupJob -Name $agentJobName -ErrorAction SilentlyContinue

if ($null -eq $job) {

    Write-Warning "⚠️ Skipping: Job '$agentJobName' not found."

    continue

}

# Get the last session for this job only (memory-safe)

$session = Get-VBRBackupSession -Job $job | Sort-Object CreationTime -Descending | Select-Object -First 1

if ($null -eq $session) {

    Write-Warning "⚠️ No session found for job: $agentJobName"

    continue

}

Write-Host "📦 Last session: $($session.CreationTime)"

$tasks = Get-VBRTaskSession -Session $session

Write-Host "🔧 Task count: $($tasks.Count)"

foreach ($task in $tasks) {

    $jobData = [PSCustomObject]@{

        JobName      = $job.Name

        Computer     = $task.Name

        StartTime    = $task.Progress.StartTime

        EndTime      = $task.Progress.StopTime

        Duration     = if ($task.Progress.StopTime -and $task.Progress.StartTime) {

            ($task.Progress.StopTime - $task.Progress.StartTime).ToString()

        } else { "N/A" }

        Status       = $task.Status

        Result       = $task.Result

        BackupSizeGB = if ($task.Progress.ProcessedSize) {

            "{0:N2}" -f ($task.Progress.ProcessedSize / 1GB)

        } else { "0.00" }

    }

    $allAgentJobData += $jobData

}

}

if ($allAgentJobData.Count -gt 0) {

$allAgentJobData | Export-Csv -Path $csvFilePath -NoTypeInformation -Encoding UTF8

Write-Host "`n✅ Agent job data exported to: $csvFilePath"

} else {

Write-Host "`n⚠️ No agent job data was found to export."

}

Error I got :

Method invocation failed because [Veeam.Backup.PowerShell.Infos.VBRComputerBackupJob] does not contain a method named '

GetLastSession'.

At C:\Users\T1SV132301\Documents\Daily_Report_Generation\Daily_Report_Generation\Veeamagent.ps1:38 char:5

```
$session = $job.GetLastSession()
```
```
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
- CategoryInfo : InvalidOperation: (:) [], RuntimeException
- FullyQualifiedErrorId : MethodNotFound

Sasi balaji 0

Define paths

$scriptDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path

$agentJobListFile = Join-Path -Path $scriptDirectory -ChildPath "AgentJobsList.txt"

$csvFilePath = Join-Path -Path $scriptDirectory -ChildPath "Veeamagent.csv"

Function to check file existence

function Check-FileExists {

param ([string]$filePath)

if (-not (Test-Path -Path $filePath)) {

    Write-Error "❌ The required file '$filePath' does not exist."

    exit 1

}

}

Check required file

Check-FileExists -filePath $agentJobListFile

Write-Host "✅ Found input file: $agentJobListFile"

Read agent jobs

$agentJobNames = Get-Content -Path $agentJobListFile

Write-Host "✅ Loaded $($agentJobNames.Count) agent job names from AgentJobsList.txt"

Initialize result container

$allAgentJobData = @()

foreach ($agentJobName in $agentJobNames) {

Write-Host "`n🚀 Processing agent job: $agentJobName"

# Attempt to get the job object

$job = Get-VBRComputerBackupJob -Name $agentJobName -ErrorAction SilentlyContinue

if (-not $job) {

    Write-Warning "⚠️ Job '$agentJobName' not found."

    continue

}

# Get the most recent session using Get-VBRBackupSession

$session = Get-VBRBackupSession | Where-Object { $_.JobName -eq $job.Name } | Sort-Object -Property EndTime -Descending | Select-Object -First 1

if (-not $session) {

    Write-Warning "⚠️ No sessions found for job: $agentJobName"

    continue

}

# Get task-level session details

$tasks = $session.GetTaskSessions()

foreach ($task in $tasks) {

    $jobData = [PSCustomObject]@{

        JobName      = $job.Name

        Computer     = $task.Name

        StartTime    = $task.Progress.StartTime

        EndTime      = $task.Progress.StopTime

        Duration     = if ($task.Progress.StopTime -and $task.Progress.StartTime) {

            ($task.Progress.StopTime - $task.Progress.StartTime).ToString()

        } else { "N/A" }

        Status       = $task.Status

        Result       = $task.Result

        BackupSizeGB = if ($task.Progress.ProcessedSize) {

            "{0:N2}" -f ($task.Progress.ProcessedSize / 1GB)

        } else { "0.00" }

    }

    $allAgentJobData += $jobData

}

}

Export to CSV

if ($allAgentJobData.Count -gt 0) {

$allAgentJobData | Export-Csv -Path $csvFilePath -NoTypeInformation -Encoding UTF8

Write-Host "`n✅ Agent job data exported to: $csvFilePath"

} else {

Write-Host "`n⚠️ No agent job data was found to export."

}

1 answer

Your answer

Answer 1

MotoX80 36,401

You posted the Powershell script as normal text. This forum is interpreting some characters in your script as formatting directives. That's why your question has multiple grey boxes. Please edit the question and repost the script using the Code Block tool.

User's image

Did you post the correct script?

The message says that the error is occurring on line 38 in Veeamagent.ps1, and that this is the statement in error.

$session = $job.GetLastSession()

But I don't see "GetLastSession" referenced anywhere in your script.

Assuming that that the $job variable is populated by a statement similar to this one...

$job = Get-VBRComputerBackupJob -Name $agentJobName -ErrorAction SilentlyContinue

...then the assumption would be that Veeam is not exposing that method.

Have Powershell list all methods and properties like this.

$job | get-member

I found a Get-VBRSession cmdlet documented here.

https://helpcenter.veeam.com/docs/backup/powershell/get-vbrsession.html?ver=120

You would need to consult the Veeam documentation on the proper way to query a session. That would be Veeam specific, and we really can't help you with that.

Rich Matheisen 47,901

I didn't find the method name in that posted function, either.

I only found one reference to the variable $job, and that only accessed the objects 'Name' property.

FWIW, here's the formatted code:

$scriptDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path
$agentJobListFile = Join-Path -Path $scriptDirectory -ChildPath "AgentJobsList.txt"
$csvFilePath = Join-Path -Path $scriptDirectory -ChildPath "Veeamagent.csv"
function Check-FileExists {
    param ([string]$filePath)
    if (-not (Test-Path -Path $filePath)) {
        Write-Error "❌ The required file '$filePath' does not exist."
        exit 1
    }
    else {
        Write-Host "✅ Found input file: $filePath"
    }
}
Check-FileExists -filePath $agentJobListFile
$allAgentJobData = @()
$agentJobNames = Get-Content -Path $agentJobListFile
Write-Host "✅ Loaded $(($agentJobNames).Count) agent job names from AgentJobsList.txt"
foreach ($agentJobName in $agentJobNames) {
    Write-Host "`n🚀 Processing agent job: $agentJobName"
    $job = Get-VBRComputerBackupJob -Name $agentJobName -ErrorAction SilentlyContinue
    if ($null -eq $job) {
        Write-Warning "⚠️ Skipping: Job '$agentJobName' not found."
        continue
    }
    # Get the last session for this job only (memory-safe)
    $session = Get-VBRBackupSession -Job $job | Sort-Object CreationTime -Descending | Select-Object -First 1
    if ($null -eq $session) {
        Write-Warning "⚠️ No session found for job: $agentJobName"
        continue
    }
    Write-Host "📦 Last session: $($session.CreationTime)"
    $tasks = Get-VBRTaskSession -Session $session
    Write-Host "🔧 Task count: $($tasks.Count)"
    foreach ($task in $tasks) {
        $jobData = [PSCustomObject]@{
            JobName      = $job.Name
            Computer     = $task.Name
            StartTime    = $task.Progress.StartTime
            EndTime      = $task.Progress.StopTime
            Duration     = if ($task.Progress.StopTime -and $task.Progress.StartTime) {
            ($task.Progress.StopTime - $task.Progress.StartTime).ToString()
            }
            else { "N/A" }
            Status       = $task.Status
            Result       = $task.Result
            BackupSizeGB = if ($task.Progress.ProcessedSize) {
                "{0:N2}" -f ($task.Progress.ProcessedSize / 1GB)
            }
            else { "0.00" }
        }
        $allAgentJobData += $jobData
    }
}
if ($allAgentJobData.Count -gt 0) {
    $allAgentJobData | Export-Csv -Path $csvFilePath -NoTypeInformation -Encoding UTF8
    Write-Host "`n✅ Agent job data exported to: $csvFilePath"
}
else {
    Write-Host "`n⚠️ No agent job data was found to export."
}

MotoX80 36,401 Reputation points

2025-05-13T15:47:07.25+00:00
He's already populating the session variable here.

# Get the last session for this job only (memory-safe) $session = Get-VBRBackupSession -Job $job | Sort-Object CreationTime -Descending | Select-Object -First 1

I think he posted the wrong script.

Sasi balaji 0

Define paths

$scriptDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path

$agentJobListFile = Join-Path -Path $scriptDirectory -ChildPath "AgentJobsList.txt"

$csvFilePath = Join-Path -Path $scriptDirectory -ChildPath "Veeamagent.csv"

Function to check file existence

function Check-FileExists {

param ([string]$filePath)

if (-not (Test-Path -Path $filePath)) {

    Write-Error "❌ The required file '$filePath' does not exist."

    exit 1

}

}

Check required file

Check-FileExists -filePath $agentJobListFile

Write-Host "✅ Found input file: $agentJobListFile"

Read agent jobs

$agentJobNames = Get-Content -Path $agentJobListFile

Write-Host "✅ Loaded $($agentJobNames.Count) agent job names from AgentJobsList.txt"

Initialize result container

$allAgentJobData = @()

foreach ($agentJobName in $agentJobNames) {

Write-Host "`n🚀 Processing agent job: $agentJobName"

# Attempt to get the job object

$job = Get-VBRComputerBackupJob -Name $agentJobName -ErrorAction SilentlyContinue

if (-not $job) {

    Write-Warning "⚠️ Job '$agentJobName' not found."

    continue

}

# Get the most recent session using Get-VBRBackupSession

$session = Get-VBRBackupSession | Where-Object { $_.JobName -eq $job.Name } | Sort-Object -Property EndTime -Descending | Select-Object -First 1

if (-not $session) {

    Write-Warning "⚠️ No sessions found for job: $agentJobName"

    continue

}

# Get task-level session details

$tasks = $session.GetTaskSessions()

foreach ($task in $tasks) {

    $jobData = [PSCustomObject]@{

        JobName      = $job.Name

        Computer     = $task.Name

        StartTime    = $task.Progress.StartTime

        EndTime      = $task.Progress.StopTime

        Duration     = if ($task.Progress.StopTime -and $task.Progress.StartTime) {

            ($task.Progress.StopTime - $task.Progress.StartTime).ToString()

        } else { "N/A" }

        Status       = $task.Status

        Result       = $task.Result

        BackupSizeGB = if ($task.Progress.ProcessedSize) {

            "{0:N2}" -f ($task.Progress.ProcessedSize / 1GB)

        } else { "0.00" }

    }

    $allAgentJobData += $jobData

}

}

Export to CSV

if ($allAgentJobData.Count -gt 0) {

$allAgentJobData | Export-Csv -Path $csvFilePath -NoTypeInformation -Encoding UTF8

Write-Host "`n✅ Agent job data exported to: $csvFilePath"

} else {

Write-Host "`n⚠️ No agent job data was found to export."

}

Sasi balaji 0 Reputation points

2025-05-14T10:37:40.8666667+00:00

I dont know why my script breaks
Sasi balaji 0 Reputation points

2025-05-14T10:40:55.87+00:00

Method invocation failed because [Veeam.Backup.PowerShell.Infos.VBRComputerBackupJob] does not contain a method named ' GetLastSession'. At C:\Users\T1SV132301\Documents\Daily_Report_Generation\Daily_Report_Generation\Veeamagent.ps1:38 char:5 + $session = $job.GetLastSession() + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (:) [], RuntimeException + FullyQualifiedErrorId : MethodNotFound
MotoX80 36,401 Reputation points

2025-05-14T11:31:30.5+00:00

I dont know why my script breaks

I have to assume that you are probably not looking at the correct script.

Where do you see the text GetLastSession in your script? I don't see it anywhere in the script that you posted.

Are you looking at this file?

C:\Users\T1SV132301\Documents\Daily_Report_Generation\Daily_Report_Generation\Veeamagent.ps1

Sasi balaji 0

$scriptDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path

$agentJobListFile = Join-Path -Path $scriptDirectory -ChildPath "AgentJobsList.txt"

$csvFilePath = Join-Path -Path $scriptDirectory -ChildPath "Veeamagent.csv"

function Check-FileExists {

param ([string]$filePath)

if (-not (Test-Path -Path $filePath)) {

    Write-Error "The required file '$filePath' does not exist."

    exit 1

}

}

Check-FileExists -filePath $agentJobListFile

$allAgentJobData = @()

$agentJobNames = Get-Content -Path $agentJobListFile

foreach ($agentJobName in $agentJobNames) {

Write-Host "Processing agent job: $agentJobName"



# Optimized job retrieval

$job = Get-VBRComputerBackupJob -Name $agentJobName -ErrorAction SilentlyContinue

if ($null -eq $job) {

    Write-Warning "Skipping: Job '$agentJobName' not found."

    continue

}

# Get ONLY the last session directly from the job object

$session = $job.GetLastSession()

if ($null -eq $session) {

    Write-Warning "No session found for job: $agentJobName"

    continue

}

# Fetch task sessions

$tasks = $session.GetTaskSessions()

foreach ($task in $tasks) {

    $jobData = [PSCustomObject]@{

        JobName      = $job.Name

        Computer     = $task.Name

        StartTime    = $task.Progress.StartTime

        EndTime      = $task.Progress.StopTime

        Duration     = if ($task.Progress.StopTime -and $task.Progress.StartTime) {

            ($task.Progress.StopTime - $task.Progress.StartTime).ToString()

        } else { "N/A" }

        Status       = $task.Status

        Result       = $task.Result

        BackupSizeGB = if ($task.Progress.ProcessedSize) {

            "{0:N2}" -f ($task.Progress.ProcessedSize / 1GB)

        } else { "0.00" }

    }

    $allAgentJobData += $jobData

}

}

if ($allAgentJobData.Count -gt 0) {

$allAgentJobData | Export-Csv -Path $csvFilePath -NoTypeInformation -Encoding UTF8

Write-Host "✅ Agent job data exported to: $csvFilePath"

} else {

Write-Host "⚠️ No agent job data was found to export."

}

Sasi balaji 0 Reputation points

2025-05-14T14:59:44.71+00:00

I have updated the another code which triggers that error.
Deleted

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MotoX80 36,401 Reputation points

2025-05-14T17:28:11.07+00:00
In the first script that you posted, you query the session with this statement.

# Get the most recent session using Get-VBRBackupSession $session = Get-VBRBackupSession | Where-Object { $_.JobName -eq $job.Name } | Sort-Object -Property EndTime -Descending | Select-Object -First 1

Did that work?

You are trying to resolve an error with this statement.

# Get ONLY the last session directly from the job object $session = $job.GetLastSession()

The error is "VBRComputerBackupJob] does not contain a method named ' GetLastSession'."

The error message is self-explanatory. There is no GetLastSession method.

Why do you think that there is a GetLastSession method? Did you copy that code from some Veeam documentation? Maybe the version of Veeam that you are running did not implement that. Did you try Get-Member as I had suggested?

If Get-VBRBackupSession works, then why did you change the script?

I searched the Veeam web site and it does not list GetLastSession.

Maybe you should be using the Get-VBRSession cmdlet.

https://helpcenter.veeam.com/docs/backup/powershell/get-vbrsession.html?ver=120

While you are using Powershell, this is really an issue with Veeam. You might want to contact their support team for help.
Sasi balaji 0 Reputation points

2025-05-15T11:23:59.4466667+00:00

Initially, I tried using the $job.GetLastSession() method assuming it was supported, possibly referencing examples from older scripts or community forums. However, after reviewing with Get-Member and checking the official Veeam documentation, I confirmed that VBRComputerBackupJob does not expose a GetLastSession() method.

I also attempted to use Get-VBRBackupSession, but it appears this cmdlet is no longer supported for computer backup jobs, as the warning suggests. Trying that route even caused an OutOfMemoryException, likely due to the volume of sessions in the environment.
MotoX80 36,401 Reputation points

2025-05-15T11:57:34.5733333+00:00
Have you tried the -Last switch?

Get the session for the specified job.

|Get-VBRSession -Job <VBRJob> [-Last] [<CommonParameters>]|

I think that you will have better luck asking for help in a Veeam specific forum.
Sasi balaji 0 Reputation points

2025-05-15T15:05:00.5566667+00:00

Perfect thankyou so much its worked

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Please help me fix this method invocation failed error.

Define paths

Function to check file existence

Check required file

Read agent jobs

Initialize result container

Export to CSV

1 answer

Define paths

Function to check file existence

Check required file

Read agent jobs

Initialize result container

Export to CSV

Your answer