A standalone topology optimization software that takes as input FNF, INP, GEO, and DAT files, generated by PTC® Creo®, Simulia® Abaqus, SolidWorks® Simulation, and Siemens NX™ respectively.


A standalone topology optimization software for PTC® Creo® users. Only FNF files generated by PTC® Creo® are accepted as input.


The software is provided 'as is' without any warranty or liability of any kind. See the License Agreement for complete information.

Download and installation

  • Click on the installation package link and save the zipped file to your local machine
  • Unzip the package to any folder (preserve the directory structure)
  • Run the CaessPrerequisites.exe and follow the instructions (requires Administrator credentials; see important note below)

  Important. As of version 4.6 the licensing system is changed substantially. Consequently, upgrading from 4.5 to 4.6 will invalidate the current license; after that a new license has to be obtained from CAESS. License replacement is free of charge.

Current version: 4.6

Build: 170714

Last update: August 04, 2017

Caess all-in-one installation package

Quick start examples

To make a quick start, it is advisable to

  • take a look at the quick start guide and
  • run a few illustrative examples.

Just download the desired example package and unzip it.

Note. The FE meshes in the basic examples are usually rather coarse in order to enable fast computation and experimentation with ProTOp parameters. In real-life applications, the used FE meshes typically have to be much finer.

Note. Many of the provided examples contain models with more than 25.000 FE nodes. To run these examples, a TRIAL license has to be acquired.

Licensing information

Evaluation License

The purpose of the EVALUATION license is to get know ProTOp operation and UI. Small examples up to max 25.000 FE nodes can be run. This license is installed automatically by installing the software.

Trial License

A TRIAL license does not contain any limitations regarding the FE model size, but requires a license request to be sent to CAESS for registration. The license itself and registration is free of charge and does not impose any obligations of any kind. To get the license and register:

  • Run CAESS License Service Manager
  • On the License tab click the Request... button
  • Fill in your data and generate a license request file that has to be sent to CAESS

You should receive your license activation file by e-mail within the next few days.

Academic and Research Licenses

Academic institutions may purchase a substantially discounted ACADEMIC license that can be used in education and non-profit research work within the institution. This license can be used by both, the students and by the academic staff. The FE model size is limited to 0.5 million FE nodes. In case of interest, please just contact our partner from your region for more information.

For non-profit research work, academic and research institutions may purchase a RESEARCH license, which does not contain any limitations of the FE model.

Commercial Licenses

For commercial use of ProTOp or ProTOpCI, a commercial license has to be purchased. For more information please just contact our partner from your region.



All CAESS installers are digitally signed by valid SHA-2 based certificates. In spite of this, it may happen that Windows® will issue a SmartScreen warning message when trying to run the installer.

If this happens, just:

▲ Click the More info link button and check the publisher - it should be CAESS

▲ After verifying the publisher, choose the Run Anyway option

The first next window you should see after starting the installer should be similar to:

To check the certificate details, just click on the Show details button and use the provided certificate info link button.