DocumentOb25.CheckOut throws an error using powershell.

Question

I'm trying to check out a topic, modify it, then check it back in via the API, but I get this error: 
 
 Cannot find an overload for "CheckOut" and the argument count: "6". At C:\Users\msemrick\OneDrive - Tesla\Desktop\checkout.ps1:14 char:1 + $ishSession.DocumentObj25.CheckOut( + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodException + FullyQualifiedErrorId : MethodCountCouldNotFindBest 
 
 The code is: 
 
 # Establish a session $ishSession = New-IshSession -WsBaseUrl $server -IshUserName $username -IshPassword $password # Checkout the document $ishSession.DocumentObj25.CheckOut( "GUID-XXX...", #psLocgicalId 3, #psVersion "en-US", #psLanguage "", #psResolution "", #psXMLRequiredCurrentMetadata "" #psXMLRequestedMetadata )

Dave De Meyer · Answer

The error is a C# programming error, you pass 6 typed parameters to the DocumentObj25 WCF proxy class, function CheckOut. And the .NET Framework runtime states that there is no CheckOut function that uses these 6 typed parameters in this order. 
 I opened up Visual Studio and saw that you need an in between structure. 
 
 -Dave

Dave De Meyer · Answer

If it really is an automated (fast) process then I would skip the Checkout/Checkin phase... Checkout/Checkin - or some people like to call it Lock/Unlock - is something user oriented. 
 I think in your scenario you can be a lot more optimistic. So your scenario looks quite pessimistic expecting concurrancy, doing a Checkout and potentially doing error handling if somebody else already has the Lock (read Checkout). In an optimistic scenario, you just download (Get-IshDocumentObjData) and update ( Set-IshDocumentObj) ... where if you run ISHRemote as a non-Administrator user you will not be allowed to update locked/checked out content. If you are running as Administrator then that update would even be succesfull (but probably not wanted). 
 Have a look at the Set-IshDocumentObj -FileContent test line 328 in github.com/.../SetIshDocumentObj.Tests.ps1

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DocumentOb25.CheckOut throws an error using powershell.