You cannot call a method on a null-valued expression. RRS feed

  • Question

  • $in = [string]$args
    $files = Get-ChildItem *.properties
    $fileExists = $false
    $dict = @{}
    foreach ($file in $files) {
        if ([System.IO.Path]::GetFileName($file) -eq $in) {
            $fileExists = $true
            $data = [System.IO.Path]::GetFileName($file)
    if ($fileExists) {
        foreach($line in Get-Content $data) {
            $words = $line.split('=', 2)
            $dict.add($words[0].Trim(), $words[1].Trim())
    } else {
        Write-Host "Doesn't exists"
    When i try to run this code. I am getting You cannot call a method on a null-valued expression. this error. Where I am doing wrong? 
    Tuesday, March 12, 2019 7:39 AM

All replies

  • If you don't like us to guess you should provide the complete error message you've got (formatted as code as well please).

    Live long and prosper!


    Tuesday, March 12, 2019 8:31 AM
  • "complete error message"


    Tuesday, March 12, 2019 11:20 AM
  • I strongly suggest that you start by learning basic PowerShell.  Your code is just a bunch of very bad guesses.  There are too many mistakes to even know where to begin.

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    Tuesday, March 12, 2019 11:23 AM
  • To begin with "$args" is an array.  Use Param instead.


    To get a file by name:

    if($file = Get-Item $InFile){
        # file found process file
        # file not found


    Tuesday, March 12, 2019 11:27 AM
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    Just do it.

    Sunday, March 31, 2019 1:19 PM
  • What's the full error message?  The split failing would cause that, with words[1] being $null.
    • Edited by JS2010 Sunday, March 31, 2019 2:30 PM
    Sunday, March 31, 2019 2:30 PM