Matlab crash when using SAP API

[xantis85]

Hello to everyone,
I got a problem when trying to retrieve the displacement history step-by-step dor node 282 using matlab. I'm using Matlab 2015a and SAP2000 v.17.2.0. The problem is that matlab crashes and I don't know what's going wrong, I'm very new to OAPI.

I'm using the following code to run analyses:
clear all;clc;
ProgramPath = 'J:\SAP\SAP2000.exe';
feature('COM_SafeArraySingleDim', 1);
feature('COM_PassSafeArrayByRef', 1);
%% create OAPI helper object
helper = actxserver('Sap2000v17.helper');
helper = helper.invoke('cHelper');
%% create Sap2000 object
SapObject = helper.CreateObject(ProgramPath);

%% start Sap2000 application
SapObject.ApplicationStart;
SapModel = SapObject.SapModel;
ret = SapModel.InitializeNewModel;
FileName = ModelPath;
ret = SapModel.File.OpenFile(FileName);

ret = SapModel.Analyze.RunAnalysis();
ret = SapModel.Results.Setup.DeselectAllCasesAndCombosForOutput;
ret = SapModel.Results.Setup.SetCaseSelectedForOutput('SismaX');
ret = SapModel.Results.Setup.SetOptionModalHist(2);
NumberResults = 0;
ObjectElm = 0;
Obj = cellstr(' ');
Elm = cellstr(' ');
LoadCase = cellstr(' ');
StepType = cellstr('Time');
StepNum = reshape(0:200,201,1);
U1 = reshape(0:200,201,1);
U2 = reshape(0:200,201,1);
U3 = reshape(0:200,201,1);
R1 = reshape(0:200,201,1);
R2 = reshape(0:200,201,1);
R3 = reshape(0:200,201,1);

Until this part, the code works. When adding the followin string:

[ret, NumberResults, Obj, Elm, LoadCase, StepType, StepNum, U1, U2, U3, R1, R2, R3] = SapModel.Results.JointAccAbs('282', ObjectElm, NumberResults, Obj, Elm, LoadCase, StepType, StepNum, U1, U2, U3, R1, R2, R3);

Matlab crashes

Anyone could help me? every suggestion would be very appreciated.
Thanks in advance
Marco.

 

[JasonMcKee71]

Did you set the mass source correctly?

Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Reifnorcement Design etc.

 

[xantis85]

The program correctly run the analyses when not using matlab.

 

[vahid942]

I have the same problem. I run my code and it works just fine. But anther day,I run the same code and MATLAB crushes after several loops. It is random!