How can I import CAD geometry from SimWise4D?

i am getting this error when using the get geometry app

Cell contents reference from a non-cell array object.

Error in cell2mat (line 42)

cellclass = class(c{1});

Error in GetSimWiseCGFrame (line 8)

cog = cell2mat(cog);

Error in GetAssemblyBodiesFromSimWise (line 22)

Frames(BodyCount) = GetSimWiseCGFrame( Frames(BodyCount), body );

Error in GetAssemblies>GetSimWiseAssembliesAndBodies (line 32)

[BodyCount, AssemblyStructure, Frames, Joints, Bodies, GroundedFrames, JointCount] =

GetAssemblyBodiesFromSimWise(assem, AssemblyStructure, AssemblyIndices, Frames, Joints, Bodies,

GroundedFrames, BodyCount, JointCount, SimWiseObject );

Error in GetAssemblies (line 20)

[~, RootAssembly, Frames, Joints, Bodies, GroundedFrames, JointCount] =

GetSimWiseAssembliesAndBodies(swroot, RootAssembly, AssemblyIndices, Frames, Joints, Bodies,

GroundedFrames, BodyCount, JointCount, SimWiseObject );

Error in CreateBodiesJointsAndFramesStructuresFromSimWiseModel (line 119)

[Assemblies, Frames, Joints, Bodies, Gears, PointToPoints, Loads, Motors, ActuatedPrismatics,

CurvedSlotJoints, GroundedFrames] = GetAssemblies( SimWiseObject, Frames, Joints, Bodies, Gears,

PointToPoints, Loads, Motors, ActuatedPrismatics, CurvedSlotJoints, GroundedFrames );

Error in ConnectToSimWiseGetDataAndBuildMechanicalModels2 (line 10)

[Assemblies, Bodies, Joints, Gears, PointToPoints, Loads, Motors, ActuatedPrismatics,

CurvedSlotJoints, Frames, GroundedFrames, AdditionalFrames, Curves] =

CreateBodiesJointsAndFramesStructuresFromSimWiseModel( SimWiseObject );

Error in GetGeometryGUI>pushbutton2_Callback (line 113)

ConnectToSimWiseGetDataAndBuildMechanicalModels2( SimWiseObject, callSimMechanicsAndWriteMGFile012, 1

);

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in GetGeometryGUI (line 44)

gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)GetGeometryGUI('pushbutton2_Callback',hObject,eventdata,guidata(hObject))

Answer 1

[Shishir Reddy]

Hi @Kudakwashe

As per my understanding, you are enountering the following the error while running the code.

Cell contents reference from a non-cell array object.

Error in cell2mat (line 42)
cellclass = class(c{1});

Error in GetSimWiseCGFrame (line 8)
cog = cell2mat(cog);

This suggests that the variable 'cog' is expected to be a cell array, but it's actually a different data type (e.g., a structure, numeric array, or string). Which implies that the following line is causing the issue -

cog = cell2mat(cog);

Kindly refer the following troubleshooting steps to resolve the problem:

1. Check the type of 'cog' before calling 'cell2mat'

Add a debugging statement before line 8 in 'GetSimWiseCGFrame.m'

disp(class(cog));

2. Verify the data returned from SimWise:

If 'cog' is being returned from a SimWise API or function, ensure that the API is returning it as a cell array, or adjust the code to handle the actual format appropriately.

3. Modify the code if necessary:

If 'cog' is already a numeric vector and not a cell, 'cell2mat' is not needed. So, that conversion step can be skipped.

I hope this resolves the issue.