SAP2000 MATLAB API, extracting displacements at a certain node.

[Ahmad Fakih]

I'm new to SAP2000 API coding,I'm trying to open an existing model and extract displacements at a certain node. My code currently opens an existing file and runs it but can't extract displacements as I'm getting this error:"First argument must be a valid .NET object"
My MATLAB API code is:

%% pass data to Sap2000 as one-dimensional arrays
feature('COM_SafeArraySingleDim', 1);
%% pass non-scalar arrays to Sap2000 API by reference
feature('COM_PassSafeArrayByRef', 1);
%% create Sap2000 object
SapObject = actxserver('CSI.SAP2000.API.SapObject');
%% start Sap2000 application
SapObject.ApplicationStart;
%% create SapModel object
Sap = SapObject.SapModel;
%% Hide Application, Hide <=> Visible
% SapObject.Hide;
%% open file
Sap.File.OpenFile('G:\Desktop\modeling\Output_2.sdb');
%% run model (this will create the analysis model)
Sap.Analyze.RunAnalysis();
AnalysisResults = NET.explicitCast(Sap.Results,'SAP2000v19.cAnalysisResults');
AnalysisResultsSetup = NET.explicitCast(AnalysisResults.Setup,'SAP2000v19.cAnalysisResultsSetup');
ret = AnalysisResultsSetup.DeselectAllCasesAndCombosForOutput;
ret = AnalysisResultsSetup.SetCaseSelectedForOutput('lATERAL lOAD')

SapResult = zeros(1,1,'double');

NumberResults = 0;
Obj = NET.createArray('System.String',2);
Elm = NET.createArray('System.String',2);
ACase = NET.createArray('System.String',2);
StepType = NET.createArray('System.String',2);
StepNum = NET.createArray('System.Double',2);
U1 = NET.createArray('System.Double',2);
U2 = NET.createArray('System.Double',2);
U3 = NET.createArray('System.Double',2);
R1 = NET.createArray('System.Double',2);
R2 = NET.createArray('System.Double',2);
R3 = NET.createArray('System.Double',2);

ret = AnalysisResults.JointDispl('ALL', 1, NumberResults, Obj, 2, ACase, StepType, StepNum, U1, U2, U3, R1, R2, R3);


%% save model
Sap.File.Save('G:\Desktop\modeling\Output_2.sdb');
%% close Sap2000
SapObject.ApplicationExit(false());
SapModel = 0;
SapObject = 0;

%% END

Can you figure out what's wrong with this code?
Thanks!

 

[JAE]

This is the wrong forum for your question. This is a software/code related question that really has nothing to do with structural engineering. Should be in forum801. Can you repost there please?