Understanding DSLS, LicGen, and SSQ.exe: How Dassault Systèmes Licensing Works

By understanding and appreciating these tools and processes, developers can create better software products, improve their development processes, and deliver more value to their customers. So next time you're tempted to overlook these unsung heroes, remember the important role they play in making software development possible.

The tools in the DSLS_SSQ_V6R2017x package work together as a system, not just individually. Here is a streamlined overview of their function:

ssqexe is a small, separate executable (or embedded library) that runs the main CAD application at startup. Its job:

The Dassault Systèmes License Server manages concurrent software usage across a network. It relies on a secure client-server model to validate authorizations.

While tools like are widely discussed in various forums, it is vital to remember that for production environments, only official licenses provided by Dassault Systèmes or authorized resellers should be used. Using unauthorized license generators can lead to software instability, lack of technical support, and legal non-compliance.

When a user runs DSLS.LicGen.v1.6.SSQ.exe , the tool requests information from the locally installed DSLS server, such as the computer name and a unique Server ID. The user then selects the product they wish to "activate" (e.g., CATIA V5R21) and clicks generate. The output is a .licz license file. This file can then be manually fed back into the DSLS server, which registers it as a legitimate license. To the server, the process appears normal, but the license it receives was generated by a third-party tool rather than being issued by Dassault Systèmes.

The server runs a background daemon (typically bound to TCP ports 4084 and 4085 ). When a workstation launches a product like CATIA, it queries the server, requests an available token, and checks it back in upon closing. 2. What is "DSLS LicGen SSQ.exe"?

The implication is that while these tools function for license generation, they may also contain undisclosed code executing malicious activities in the background. Running such software, especially on a primary or networked work computer, poses a severe security threat.

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If you are setting up a legitimate lab or enterprise environment and need assistance with official Dassault Systèmes licensing, I can help you find documentation on: for Windows or Linux Network vs. Local license server configuration Troubleshooting DSLS connection and SSL certificate issues

So acme_license.bin contains: