Dlubal Online License

Technical Article on the Topic Structural Analysis Using Dlubal Software

  • Knowledge Base

Technical Article

Everything is online. The same is true for the Dlubal licenses for RFEM 6, RSTAB 9, and RSECTION. This article contains information about using and managing online licenses, reserving licenses, checking the license validity, and moving authorizations between the licenses.

Technical requirements

For successful online licensing, you need an active Dlubal account. It is necessary to install the Dlubal software on a Windows operating system (8, 10, or 11). Your personal computer requires a stable Internet connection, and it is necessary to allow incoming and outgoing communication via port 443.

After logging in, a connection to our license server https://lm.dlubal.com/ is established via an SSL channel. RFEM, RSTAB, and RSECTION are connected to our license server and obtain our SSL certificate. If you have any problems with the SSL certificate, please check FAQ 5118.

Borrowing online license

A user can borrow the selected license for a maximum of 30 days. He or she can do it in the License Manager available in the application. The license is locked for a specified period of time, and cannot be used by anyone else. It does not matter whether the user is online or offline. His or her offline license file is still available until the borrowing period has expired or the license is returned manually.

You can return the license earlier in the License Manager. This requires an active Internet connection. The process of borrowing a license is described in FAQ 5307. The time information of the active license session, which can be viewed in the Extranet, refers to UTC (Universal Time Coordinated). Therefore, there may be a difference between the display of the License Manager and the Extranet. See also FAQ 5305 and the Explanation of Coordinated Universal Time.

Reserving online license

It can be useful to always have certain licenses available to the same user. Extranet users with administrator rights can assign online licenses to individual users.

  1. In the Extranet, select the company data display.
  2. Now, you can display the overview of users.
  3. In the next step, edit the user for whom the license should be reserved.
  4. Finally, you only need to select an available online license as "Reserved".
  5. Click "Save" to complete the process.

Reserved licenses can only be used by this user.

Moving authorizations

Online licenses can include main programs and various add-ons. In the Extranet, it is possible to change the configuration of online licenses by moving the individual add-ons or the main programs from License A to License B. This operation is only possible if the license is not currently in use. You can find further information in FAQ 5139.

Ending license session

By closing the program with an active Internet connection, the license is released within a few seconds. If there is an active Internet connection, logging out of the program releases the license. After a session duration of 24 hours, the license on the Dlubal license server is automatically released, except for borrowed licenses.

Offline Use

At the time of writing this article (10/2023), it is not possible to use a license for RFEM 6, RSTAB 9, or RSECTION for purely offline use. Every 24 hours – at most every 30 days in the case of borrowed licenses – the license session must be updated via a secure Internet connection to the Dlubal license server.


Dipl.-Ing. (FH) René Flori

Dipl.-Ing. (FH) René Flori

Head of Customer Support

Mr. Flori is the customer support team leader and also provides technical support for customers of Dlubal Software.


Online License Borrow Move Reserve


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  • Updated 10/19/2023

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Hall with Arched Roof

Main Program

The structural analysis program RFEM 6 is the basis of a modular software system. The main program RFEM 6 is used to define structures, materials, and loads of planar and spatial structural systems consisting of plates, walls, shells, and members. The program can also design combined structures as well as solid and contact elements.

Price of First License
4,450.00 EUR
Structural Frame and Truss Analysis Software

Main Program

The structural frame & truss analysis and design program RSTAB 9 contains a similar range of functions as the FEA software RFEM, paying special attention to frames and trusses. Therefore, it is very easy to use and for many years, it has been the best choice for the structural analysis of beam structures consisting of steel, concrete, timber, aluminum, and other materials.

Price of First License
2,850.00 EUR
Aluminum Cross-Section Stress

Main Program

The RSECTION stand-alone program determines the section properties for any thin-walled and massive cross-sections and performs a stress analysis.

Price of First License
1,850.00 EUR