Problem with checkout

Question

Hi - I'm able to download modules into a local folder, but in order to update and checkin, the topic must first be checked out. I don't understand the error I am getting using the code below. The error is below the line of code. It looks like the right number of arguments are being sent. 
 
 $ishSession.DocumentObj25.CheckOut($fileGUID, "1", "en-US", "", "", "") 
 Cannot find an overload for "CheckOut" and the argument count: "6". At C:\SDL\PowerShellScripts\Code\GetSaveEditSaveLoad4.ps1:42 char:9 + $ishSession.DocumentObj25.CheckOut($fileGUID, "1", "en-US", " ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodException + FullyQualifiedErrorId : MethodCountCouldNotFindBest

Alex Sarafian · Accepted Answer

Hi Richard, why are you using the internal proxies from the ishSession object? Please prefer always the cmdlets of ISHRemote over the proxies of the session object. 
 
Regarding your error, the signature of the function you try to use is not aligned with your implementation. This is a standard .net error. It's not that easy to see the signature in PowerShell because PowerShell hasn't been built for this, and this one more reason for my initial advice. Still one trick is to open PowerShell ISE, and fill in half of the function name and press Ctrl+Space. For a short period you'll have a similar experience with Visual Studio

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Problem with checkout