New-object itextsharp causes an error

Question

Hi, i am trying to use powershell to read a pdf document with the following code
[System.Reflection.Assembly]::LoadFrom(".\itextsharp.dll")
$reader = New-Object iTextSharp.text.pdf.PdfReader -ArgumentList ".\201408_issue.pdf"
for ($page = 1; $page -le $reader.NumberOfPages; $page++) {
$lines = [char[]]$reader.GetPageContent($page) -join "" -split "`n"
foreach ($line in $lines) {
if ($line -match 'test')
$matches[1]
I get an error though, has anyone encoutnered this? Thanks
New-Object : Exception calling ".ctor" with "1" argument(s): "Object reference not set to an instance
of an object."
At C:\PsScripts\test\PDFReader\PDFReader.ps1:2 char:11
+ $reader = New-Object iTextSharp.text.pdf.PdfReader -ArgumentList ".\201408_RIN_i ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [New-Object], MethodInvocationException
+ FullyQualifiedErrorId : ConstructorInvokedThrowException,Microsoft.PowerShell.Commands.NewObject
Command

Answer 1

PS C:\PsScripts\test\PDFReader> $error[0].Exception | Format-List * -Force
ErrorRecord : Exception calling ".ctor" with "1" argument(s): "Object reference not
set to an instance of an object."
StackTrace : at System.Management.Automation.DotNetAdapter.AuxiliaryConstructorInvo
ke(MethodInformation methodInformation, Object[] arguments, Object[]
originalArguments)
at
System.Management.Automation.DotNetAdapter.ConstructorInvokeDotNet(Type
type, ConstructorInfo[] constructors, Object[] arguments)
at
Microsoft.PowerShell.Commands.NewObjectCommand.CallConstructor(Type
type, ConstructorInfo[] constructors, Object[] args)
WasThrownFromThrowStatement : False
Message : Exception calling ".ctor" with "1" argument(s): "Object reference not
set to an instance of an object."
Data : {}
InnerException : System.NullReferenceException: Object reference not set to an instance
of an object.
at iTextSharp.text.pdf.PdfReader.ReadObjStm(PRStream stream,
IntHashtable map)
at iTextSharp.text.pdf.PdfReader.ReadDocObj()
at iTextSharp.text.pdf.PdfReader.ReadPdf()
TargetSite : System.Object AuxiliaryConstructorInvoke(System.Management.Automation.Met
hodInformation, System.Object[], System.Object[])
HelpLink :
Source : System.Management.Automation
HResult : -2146233087
Any meaning to you?