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Cannot index into a null array.
At C:\Source\IPAddress.ps1:56 char:1
+ $originalIPAddress = $nic.IPAddress[0].IPAddress
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray

Cannot index into a null array.
At C:\Source\IPAddress.ps1:57 char:1
+ $originalSubnetMask = $nic.IPAddress[0].SubnetMask
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray

Cannot index into a null array.
At C:\Source\IPAddress.ps1:58 char:1
+ $originalGateway = $nic.IPAddress[0].Gateway
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray

Cannot index into a null array.
At C:\Source\IPAddress.ps1:59 char:1
+ $originalDNSServer = $nic.IPAddress[0].DNSServer
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray

Error changing NIC settings: The property 'IPAddress' cannot be found on this object. Verify that the property exists and can be set.
New-Timer : The term 'New-Timer' is not recognized as the name of a cmdlet, function, script file, or operable
program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\Source\IPAddress.ps1:65 char:10
+ $timer = New-Timer -Interval 30000
+          ~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (New-Timer:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Register-ObjectEvent : Cannot bind argument to parameter 'InputObject' because it is null.
At C:\Source\IPAddress.ps1:66 char:35
+ Register-ObjectEvent -InputObject $timer -EventName Elapsed -SourceId ...
+                                   ~~~~~~
    + CategoryInfo          : InvalidData: (:) [Register-ObjectEvent], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.RegisterObj
   ectEventCommand

You cannot call a method on a null-valued expression.
At C:\Source\IPAddress.ps1:70 char:1
+ $timer.Start()
+ ~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull