some examples solving failed

Microsoft Windows [Version 10.0.19043.1110] Python 3.9.5 (tags/v3.9.5:0a7dcbd, May 3 2021, 17:27:52) [MSC v.1928 64 bit (AMD64)] on win32

Compiling by python setup.py build

many similar prints like the following C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\1 /c /nologo /Ox /W3 /GL /DNDEBUG /MD -DVERSION_INFO="1.0.276" -Id:\vsc_dyn\ex3.9.egg\pybind11\include -Isrc -Iinclude -Iinclude/pybind11 -Iinclude/lest -I -IE:\ZAProgramsInstalled\Python39\include -IE:\ZAProgramsInstalled\Python39\iicrosoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\ATLMFC\includoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\include -IC:\Progrclude\10.0.19041.0\ucrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0s (x86)\Windows Kits\10\include\10.0.19041.0\um -IC:\Program Files (x86)\Windwinrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt Data.cpp /Fobuild\temp.win-amd64-3.9\Release\src/Objects/CNodeGenericData.obj /GL /W3 /Gy /Zc:wchar_t /Zi /Gm- /O2 /sdl /Zc:inline /fp:precise /D _MBCS /DGS /errorReport:prompt /WX- /Zc:forScope /Gd /Oy /Oi /openmp /std:c++17 /FC /E /arch:AVX2 CNodeGenericData.cpp

then add D:/vsc_dyn/EXUDYN/main/build/lib.win-amd64-3.9/ to .pth file in python directory site-packages.

expamples which success , are main\pythonDev\Examples\3SpringsDistance.py ANCF_slidingJoint2D.py ANCF_slidingJoint2Drigid.py cartesianSpringDamper.py addPrismaticJoint.py addRevoluteJoint.py ANCF_cantilever_test_dyn.py ANCF_cantilever_test.py ANCF_contact_circle.py ANCF_contact_circle2.py ANCF_slidingJoint2D.py ANCF_slidingJoint2Drigid.py ANCF_tests2.py ANCFALEtest.py bicycleIftommBenchmark.py cartesianSpringDamper.py coordinateSpringDamper.py finiteSegmentMethod.py flexibleRotor3Dtest.py geneticOptimizationExample.py geneticOptimizationSliderCrank.py interactiveTutorial.py lavalRotor2Dtest.py leggedRobot.py multiMbsTest.py multiprocessingTest.py myFirstExample.py

ALEANCF_pipe.py ANCF_moving_rigidbody.py ANCF_switchingSlidingJoint2D.py

print the following

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated")

ANCF_test_halfcircle.py

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveStatic terminated due to errors File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\solver.py", line 165, in SolveStatic

massSpringFrictionInteractive.py

Exception has occurred: TypeError (note: full exception trace is shown but execution is paused at: _run_module_as_main) UFspring() takes 9 positional arguments but 10 were given File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\interactive.py", line 425, in InitializeSolver self.mbs.sys['solver'].InitializeSolver(self.mbs, self.simulationSettings) File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\interactive.py", line 281, in init self.InitializeSolver() #solver gets ready to be called repeatedly

after I changed python 3.9 to anaconda3 2020.02 python3.7.6 and re-compile ,all examples succeeded. after I changed python 3.9 to anaconda3 2020.02 python3.7.6 and re-compile ,all examples succeeded. Perhaps, ngsolve's interface to python is only valid for python 3.7 ,thus libngpy could be imported correctly .

there are still failure examples:

Exception has occurred: RuntimeError (note: full exception trace is shown but execution is paused at: _run_module_as_main) Unable to cast Python instance to C++ type (compile in debug mode for details) File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\robotics.py", line 325, in CreateRedundantCoordinateMBS visualization=VObjectJointGeneric(axesRadius = 0.01,axesLength=0.1, color=color4red))) File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\serialRobotOldTests.py", line 283, in robotDict = newRobot.CreateRedundantCoordinateMBS(mbs, loadJointUserFunctionslist, baseMarker)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\SliderCrank.py", line 130, in exu.SolveDynamic(mbs, simulationSettings)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\sliderCrankCMSacme.py", line 457, in exu.SolveDynamic(mbs, simulationSettings)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\solutionViewerTest.py", line 138, in exu.SolveDynamic(mbs, simulationSettings, showHints=True)

after I changed python 3.9 to anaconda3 2020.02 python3.7.6 and re-compile ,all examples succeeded. after I changed python 3.9 to anaconda3 2020.02 python3.7.6 and re-compile ,all examples succeeded. Perhaps, ngsolve's interface to python is only valid for python 3.7 ,thus libngpy could be imported correctly .

there are still failure examples:

Exception has occurred: RuntimeError (note: full exception trace is shown but execution is paused at: _run_module_as_main) Unable to cast Python instance to C++ type (compile in debug mode for details) File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\robotics.py", line 325, in CreateRedundantCoordinateMBS visualization=VObjectJointGeneric(axesRadius = 0.01,axesLength=0.1, color=color4red))) File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\serialRobotOldTests.py", line 283, in robotDict = newRobot.CreateRedundantCoordinateMBS(mbs, loadJointUserFunctionslist, baseMarker)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\SliderCrank.py", line 130, in exu.SolveDynamic(mbs, simulationSettings)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\sliderCrankCMSacme.py", line 457, in exu.SolveDynamic(mbs, simulationSettings)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\solutionViewerTest.py", line 138, in exu.SolveDynamic(mbs, simulationSettings, showHints=True)

Thanks for using Exudyn! As mentioned in theDoc:

VS2019 did not work so far due to problems with Eigen / Sparse. This would explain some examples not running
Python 3.7 is recommended under Windows; Python 3.8 also has been tested
Python 3.9 has been successfully tested under Linux but not under Windows.
NGsolve has only been tested under Python 3.7 under Windows and MacOS

Microsoft Windows [Version 10.0.19043.1110] Python 3.9.5 (tags/v3.9.5:0a7dcbd, May 3 2021, 17:27:52) [MSC v.1928 64 bit (AMD64)] on win32

Compiling by python setup.py build

many similar prints like the following C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\1 /c /nologo /Ox /W3 /GL /DNDEBUG /MD -DVERSION_INFO="1.0.276" -Id:\vsc_dyn\ex3.9.egg\pybind11\include -Isrc -Iinclude -Iinclude/pybind11 -Iinclude/lest -I -IE:\ZAProgramsInstalled\Python39\include -IE:\ZAProgramsInstalled\Python39\iicrosoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\ATLMFC\includoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\include -IC:\Progrclude\10.0.19041.0\ucrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0s (x86)\Windows Kits\10\include\10.0.19041.0\um -IC:\Program Files (x86)\Windwinrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt Data.cpp /Fobuild\temp.win-amd64-3.9\Release\src/Objects/CNodeGenericData.obj /GL /W3 /Gy /Zc:wchar_t /Zi /Gm- /O2 /sdl /Zc:inline /fp:precise /D _MBCS /DGS /errorReport:prompt /WX- /Zc:forScope /Gd /Oy /Oi /openmp /std:c++17 /FC /E /arch:AVX2 CNodeGenericData.cpp

then add D:/vsc_dyn/EXUDYN/main/build/lib.win-amd64-3.9/ to .pth file in python directory site-packages.

expamples which success , are main\pythonDev\Examples\3SpringsDistance.py ANCF_slidingJoint2D.py ANCF_slidingJoint2Drigid.py cartesianSpringDamper.py addPrismaticJoint.py addRevoluteJoint.py ANCF_cantilever_test_dyn.py ANCF_cantilever_test.py ANCF_contact_circle.py ANCF_contact_circle2.py ANCF_slidingJoint2D.py ANCF_slidingJoint2Drigid.py ANCF_tests2.py ANCFALEtest.py bicycleIftommBenchmark.py cartesianSpringDamper.py coordinateSpringDamper.py finiteSegmentMethod.py flexibleRotor3Dtest.py geneticOptimizationExample.py geneticOptimizationSliderCrank.py interactiveTutorial.py lavalRotor2Dtest.py leggedRobot.py multiMbsTest.py multiprocessingTest.py myFirstExample.py

ALEANCF_pipe.py ANCF_moving_rigidbody.py ANCF_switchingSlidingJoint2D.py

print the following

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated")

ANCF_test_halfcircle.py

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveStatic terminated due to errors File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\solver.py", line 165, in SolveStatic

massSpringFrictionInteractive.py

Exception has occurred: TypeError (note: full exception trace is shown but execution is paused at: _run_module_as_main) UFspring() takes 9 positional arguments but 10 were given File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\interactive.py", line 425, in InitializeSolver self.mbs.sys['solver'].InitializeSolver(self.mbs, self.simulationSettings) File "D:\vsc_dyn\EXUDYN\main\build\lib.win-amd64-3.9\exudyn\interactive.py", line 281, in init self.InitializeSolver() #solver gets ready to be called repeatedly

Thanks for using Exudyn! As mentioned in theDoc:

VS2019 did not work so far due to problems with Eigen / Sparse. This would explain some examples not running
Python 3.7 is recommended under Windows; Python 3.8 also has been tested
Python 3.9 has been successfully tested under Linux but not under Windows.
NGsolve has only been tested under Python 3.7 under Windows and MacOS

after I changed python 3.9 to anaconda3 2020.02 python3.7.6 and re-compile ,all examples succeeded. after I changed python 3.9 to anaconda3 2020.02 python3.7.6 and re-compile ,all examples succeeded. Perhaps, ngsolve's interface to python is only valid for python 3.7 ,thus libngpy could be imported correctly .

there are still failure examples:

Exception has occurred: RuntimeError (note: full exception trace is shown but execution is paused at: _run_module_as_main) Unable to cast Python instance to C++ type (compile in debug mode for details) File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\robotics.py", line 325, in CreateRedundantCoordinateMBS visualization=VObjectJointGeneric(axesRadius = 0.01,axesLength=0.1, color=color4red))) File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\serialRobotOldTests.py", line 283, in robotDict = newRobot.CreateRedundantCoordinateMBS(mbs, loadJointUserFunctionslist, baseMarker)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\SliderCrank.py", line 130, in exu.SolveDynamic(mbs, simulationSettings)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\sliderCrankCMSacme.py", line 457, in exu.SolveDynamic(mbs, simulationSettings)

Exception has occurred: ValueError (note: full exception trace is shown but execution is paused at: _run_module_as_main) SolveDynamic terminated File "D:\vsc_dyn\EXUDYN\main\py37build\lib.win-amd64-3.7\exudyn\solver.py", line 249, in SolveDynamic raise ValueError("SolveDynamic terminated") File "D:\vsc_dyn\EXUDYN\main\pythonDev\Examples\solutionViewerTest.py", line 138, in exu.SolveDynamic(mbs, simulationSettings, showHints=True)

The error in SolveDynamic always occurs, because this is the interface to C++ and problems occur somewhere inside C++. In order to understand the reasons for the exceptions, I would need more details of the error messages. Furthermore, it is very helpful to know how you installed the lib. Did you use "python setup.py install"? Why don't you just install the wheels for your Anaconda (as recommended in theDoc.pdf?)

Thanks a lot for helping to improve Exudyn!

Thank you for EXUDYN, I have another question, how can I study these theroy in EXUDYN? what book could you recommend for me ? I have finished Ahmed A. Shabana - Dynamics of Multibody Systems-4th.pdf and I am reading Dynamics of Flexible Multibody Systems Rigid Finite Element Method , but I am still perplexed. There are several methods for Dynamics of Multibody Systems .

Moved this question to Discussion/Theory !

jgerstmayr / EXUDYN

some examples solving failed #5