When does DocumentManagementClient.GetNodeByPath() method in C# program hit error

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littlered_980005
littlered_980005
in General Questions #1

I am developing a C# program to upload a document into a folder in OpenText. I use the following C# code snippet to obtain the Node ID of the target folder in OpenText.

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long myRootID = 2000;
DocumentManagementClient docManClient = new DocumentManagementClient();
string FolderPath = @"NOM\Member Services\Nomination Scheme (restricted access)\Nomination applications for alive members (CCC Nominations & Revocations)\Processed (i.e. actions taken)\Nomination Forms and Booklets Year 2020";
Node myNode = null;
string[] myFolderPath;
myFolderPath = FolderPath.Split('\');
// Create the OTAuthentication object and set the authentication token
OTAuthentication otAuth = new OTAuthentication();
otAuth.AuthenticationToken = authToken;
myNode = docManClient.GetNodeByPath(ref otAuth, myRootID, myFolderPath);

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However, when running the above C# codes, each time at the line of "docManClient.GetNodeByPath", the program will throw an exception of "Object reference not set to an instance of an object".

I can 100% guarantee that the full path of the folder (under the variable "FolderPath") is accurate and it really exists in the OpenText environment.

To make things clearer, I would like to show the C# source codes of the method GetNodeByPath() in nested levels as below.

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    public CPFDocumentUpload.CWS.Node GetNodeByPath(ref CPFDocumentUpload.CWS.OTAuthentication OTAuthentication, long rootID, string[] pathElements) {

        CPFDocumentUpload.CWS.GetNodeByPathRequest inValue = new CPFDocumentUpload.CWS.GetNodeByPathRequest();

        inValue.OTAuthentication = OTAuthentication;

        inValue.rootID = rootID;

        inValue.pathElements = pathElements;

        CPFDocumentUpload.CWS.GetNodeByPathResponse retVal = ((CPFDocumentUpload.CWS.DocumentManagement)(this)).GetNodeByPath(inValue);

        OTAuthentication = retVal.OTAuthentication;

        return retVal.GetNodeByPathResult;

    }

    [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]

    CPFDocumentUpload.CWS.GetNodeByPathResponse CPFDocumentUpload.CWS.DocumentManagement.GetNodeByPath(CPFDocumentUpload.CWS.GetNodeByPathRequest request) {

        return base.Channel.GetNodeByPath(request);

    }

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Anybody can help to give me an idea why it can throw such an exception?

Many Thanks.

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