MapleSim Questions and Posts

These are Posts and Questions associated with the product, MapleSim


I did the base part of a robot in the MapleSim. I am trying to get the differential equation of the system, but the MapleSim gave me 2 different differential equations. When I use these differential equations, I could not reach to my goal. I think I need only one differential equation whose degree must be 2. The system works well, but the problem is a differential equation of the system. How can I get the correct differential equation? And also, why are there 2 different equations? Which one represents what? Thanks for answering.


We have just released updates to Maple and MapleSim, which provide corrections and improvements to product functionality.

As usual, the Maple update is available through Tools>Check for Updates in Maple, and is also available from our website on the Maple 2018.2.1 download page, where you can also find more details.

For MapleSim users, use Help>Check for Updates or visit the MapleSim 2018.2.1 download page.

How could this be set up in Maplesim?  A vibration signal is imparted on the box and we want to observe the behavior of the sprung object inside the box.

We have just released an update to Maple, Maple 2018.2. This release includes improvements in a variety of areas, including code edit regions, Workbooks, and Physics, as well as support for macOS 10.14.

This update is available through Tools>Check for Updates in Maple, and is also available from our website on the Maple 2018.2 download page, where you can also find more details.

For MapleSim users, the update includes optimizations for handling large models, improvements to model import and export, updates to the hydraulics and pneumatics libraries, and more. For more details and download instructions, visit the MapleSim 2018.2 download page.

I need help for two exercise. In the first I have in the secondary circuit nothing, in the second exercise un inductor.thanksinduzione_fra_due_circuiti.msim


How do I simulate the mathematical model of infectious disease using MapleSm? Is it possible? because I had search through the tool in MapleSim is full of engineering tools. 

Thanks to Mr. Joe Riel, my previous problem is the port's name and the input signal's name was the same name was solved. It worked well in the new model but when I try to do exactly the same thing in my current model, the custom component can't be generated even if the "Check dimension" button shown that "no issues found". 

This time error is:
(in SetComponent) flattening error: Errors: Input length = 1
Error in Component btnGenComponent with the caption "Generate MapleSim Component"

Does anyone know from what this error "Input length = 1" happens? 

I am very appreciated for your help.

Why Sim Biology and Bioinformatics are not included in the maple sim?

Hi everyone, I need to use the integral calculation in MapleSim but there is no MapleSim Block to do it. So I create a Custom Component and using the integral calculation from Maple, the expression of the equation was done. But when I click Dimension analysis button, one error popped out as the photo. Have anyone got the same error before? How should I do to solve it? Thank you very much.

We have just released a new version of MapleSim.  The MapleSim 2018 family of products offers new tools for developing digital twins, greater connectivity with other modeling tools, and expanded modeling scope. Improvements include:

  • New tools for creating motion profiles
  • FMI  import for FMI 2.0 Fixed-Step Co-Simulation
  • Optimized handling of large models
  • Inclusion of temperature effects in the MapleSim Hydraulics Library from Modelon and MapleSim Pneumatics Library from Modelon
  • Heat transfer through air and water with the MapleSim Heat Transfer Library from CYBERNET

See What’s New in MapleSim 2018 for more information about these and other improvements.

I have training video that shows the visualization window "docked" below the main window.   Can this work space arrangement be done in sim2017 ??  

Also I push the anchor button and nothing seems to happen 


by passing all steps to install Maplesim 2017.3 i confort the error "The system cannot find the file specidied" when i want to open it. what shoud i do?

Dear All

I seldom need support, Maple/MapleSim usually runs OK, but here I'm stuck with MapleSim 2017 I'm modelling some thermal fluid properties and each time I make a sub-system I get two errors:

1) the entries (and exit variables) "rho, Cp, Cv, lambda, and nu" of my models are set to default "1" instead of my expected value the names of my fluid-parameter items. I must rename them by hand to be able to solve my model, why not a link to the fluid parameter node ?

2) I get a pressure p (or is it a "rho"?) issue: "Cannot resolve `Main.Block1.p`; there is no `p` in variable `Main.Block1`" when I create a sub-system I call here Block1 and my model does not solve if I make any "sub-systems", and I cannot find out what to do, is this an initial value issue ? the error message could be more helpful ;)

Any clues how to get around this ?

Thnaks in avance



I have modeled a 3D flexible manipulator in Maplesim. I intend to measure the torsional strain of the flexible beams. How can I do this??

Dear all

I solve an optimization problem ( minimization or maximization) using lagrangeMultiplier theorem 

The objective function is f:=(x,y,z) =x*y+y*z;

The constraints are: x*y=1  and y^2+z^2=1;

Using a numerical method I get the follwing point 

x = 1.41421356249703, y = .707106781124551, z = .707106781248575

How can I confirm that this point is a minumum or maximum

Maybe I must use Hessian matrix or something else.

Which condition must be introduced to know the type ( maximum or minumum) this point.

Many thanks for your help


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