In the Knowledge Base, you’ll find technical articles and tips & tricks that may help you with your design using Dlubal Software.
Frequently Asked Questions (FAQ)
I have installed RFEM/RSTAB properly without any error messages. When opening the program, it does not start as a full version but shows a dialog box where the authorisation file can be imported or the test licence can be started. The dongle is red and so the hardlock should be ok. What can I do?
FAQ 000070 EN Installation PLATE-BUCKLING RFEM RSTAB RX-TIMBER SHAPE-MASSIVE SHAPE-THIN
This is probably caused by the installation that was carried out without administrator rights or without the current authorisation file. In the first case, it is necessary to approve write access for the respective user regarding the file folders of the Dlubal Software programs in Windows Explorer, and to import your authorisation file again.
In the second case, you only need to visit the Extranet of the Dlubal Software homepage and download the current authorisation file after entering your user data. This file can then be re-imported after opening the respective Dlubal Software program as well.
FAQ 000069 EN Display Settings RFEM RSTAB
In RSTAB, our standard rotation angle unit is "rad."
The results of the node deformations in Table 4.6 are displayed in "mrad," that is, milliradian.
The following general formulas are taken for the conversion of angular dimensions, using rad as the unit for arc length dimension:
From arc length dimension to degree: alpha = (180° / pi) * x
From degree to arc length dimension: x = (pi / 180°) * alpha
For the direct conversion of the unit "mrad" of the arc length dimension used in RSTAB:
From arc length dimension to degree: alpha = (180° / (pi * 1000)) * x
Please note that the values are in "mrad."
I have several crossing members modelled in my structural system, but they are still not connected with each other. How can I easily create a node at the connection point?
FAQ 000067 EN Modeling | Structure RFEM RSTAB
AnswerThe command that you need is "Connect Members".
You can access it by clicking the menu
Edit > Model Data > Members > Connect Lines/Members
or by using the corresponding toolbar button.
Then, you can draw a window across the location of the connection to create a node between the intersecting members.
I would like to save only the input data (without results) after the completion of the project. Is there any archiving possibility for this?
FAQ 000066 EN Data Management RFEM RSTAB
AnswerIn the Project Manager, you have the possibility to save selected models or an entire project in a compressed backup file.
First, choose the models or the project that you want to archive, and then select Archive Data > Make Archive from the menu.
Now, you can decide if the results and printout reports will be archived, too.
Then, after entering the desired file name and defining the path, start the archiving with OK.
FAQ 000065 EN Calculation RFEM
AnswerThe choice of the solver method leading quickly to results depends on the complexity of the model as well as the size of the main memory (RAM) that is available:
- For small and medium size systems, the direct solver method is more effective.
- For big and complex systems, the iterative method is faster for results output.
As soon as the matrices for the direct method cannot be stored any longer in the main memory, Windows starts to swap out parts of the data to the hard disk. The hard disk activities will increase and the processor load will be reduced which is visible in the Windows Task Manager. By using the iterative ICG (Incomplete Conjugate Gradient) calculation method you can avoid this storage problem.
By using the direct calculation method, it is possible to use more random access memory (RAM) when working with a 64-bit operating system. Now, you can directly calculate larger systems with all load cases and load combinations, which will save a lot of time.
The Dlubal Software programs are to be installed on a new computer. The installation of the programs is aborted because the dongle driver cannot be installed properly. What should I do?
FAQ 000063 EN Installation PLATE-BUCKLING RFEM RSTAB RX-TIMBER SHAPE-THIN
AnswerIn general, keep in mind that administrator rights are required for a successful installation under Windows. If there are no sufficient rights, it may happen that the installation of the dongle driver is interrupted.
Another reason for the break-off during the installation may be the virus scanner because antivirus software is often set too "sharp". Normally, it is sufficient if the filter setting of the virus scanner is adjusted, or if the scanner is completely deactivated temporarily.
FAQ 000062 EN Installation
AnswerUsing the following link, you can download a program that helps you write the data of the computer's hardlock (dongle) or network dongle into a file:
First, unpack the file KeyDump_HASP4.zip and execute the file KeyDump.exe in the unpacked folder. A small tool opens where you will see the hardlock displayed below "License Information". If it is not displayed, the dongle may be defect, or the driver is not installed correctly.
Usually, dongle drivers are installed automatically when you install RFEM or RSTAB. If this did not occur, the dongle driver can also be installed manually. Use the following link to download the current driver from the manufacturer of your operating system:
Furthermore, you should check the following:
- Make sure that only the hardlock of Dlubal Software is plugged into the USB port during the installation. Remove dongles of other manufacturers.
- A successful installation on Windows systems requires administrator rights.
Have you found your question?
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