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Catching an error.... TypeNoteFound RRS feed

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    Hello -

    First my PowerShell verion:

    PS C:\windows\system32> $PSVersionTable.PSVersion

    Major  Minor  Build  Revision
    -----  -----  -----  --------
    5      0      10586  1176  


    I am trying to catch the following output:

    Compare-Object : Cannot bind argument to parameter 'ReferenceObject' because it is null.
At line:62 char:43
+                 $Result = Compare-Object  $SrcDir $DstDir -Property H ...
+                                           ~~~~~~~
    + CategoryInfo          : InvalidData: (:) [Compare-Object], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.CompareObjectCommand

    I am using the following:

            try {
                # code that causes exception
                $Result = Compare-Object  $SrcDir $DstDir -Property Hash,Path | leftside | Format-Table Path -ErrorAction Continue

            }
       catch [System.Management.Automation.ParameterArgumentValidationErrorNullNotAllowed]   {
                      
                #Write-Host "An error occurred: $($error[0].errordetails.message)" }

    I am receiving the following:

    Unable to find type [System.Management.Automation.ParameterArgumentValidationErrorNullNotAllowed].
At line:53 char:17
+ ...             $Result = Compare-Object  $SrcDir $DstDir -Property Hash, ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Manageme...rNullNotAllowed:TypeName) [], RuntimeException
    + FullyQualifiedErrorId : TypeNotFound

    I used to grab the ParameterArgumentValidationErrorNullNotAllow part.

            try {
                # code that causes exception
                $Result = Compare-Object  $SrcDir $DstDir -Property Hash,Path | leftside | Format-Table Path -ErrorAction Continue

            }
       catch    {
                $_.Exception.GetType().FullName
                
                }

    Any suggestions.... I don't have much more hair left to lose.  Thanks.

    The Compare-Object is being used to compere MD5 Hash on files and directories.





    • Edited by jasonh17 Thursday, November 9, 2017 9:27 PM
    • Moved by Bill_Stewart Thursday, January 25, 2018 10:15 PM Unanswerable drive-by question
    Thursday, November 9, 2017 9:23 PM

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    Many types cannot be directly caught that way.

    \_(ツ)_/

    Thursday, November 9, 2017 11:30 PM
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    The exception is telling your that $SrcDir is null.

    \_(ツ)_/

    Thursday, November 9, 2017 11:35 PM
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    Here is how to trap parameter errors>

    Try{
    Compare-Object  $SrcDir $DstDir -ErrorAction Stop
}
Catch [System.Management.Automation.ParameterBindingException] {
    Write-Host $_
}

    \_(ツ)_/

    Thursday, November 9, 2017 11:39 PM