#### Further Information

In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.

Receive information including news, useful tips, scheduled events, special offers, and vouchers on a regular basis.

• ### After having downloaded the installation file, an error message appears saying that the setup file is defective. What can I do?

New FAQ 003619 EN-US

• ### Do you have to install the full version or test on Windows Vista, an alert message indicating you have insufficient free space?If so, how?

FAQ 003471 EN-US

The capacity of your C drive: no longer allows installation of the program. You must choose another partition of your hard drive for installation. You can proceed as described below:
• Start by displaying the "Run" command from the Start menu by clicking Start Menu> Run (or the Windows + R key)
• Type regedit and confirm
• Open the key: HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion
• On the right, double click on the key: ProgramFilesDir and modify the data of this key by the new path of the installation folder.
• For example, enter the path D: \ Program Files to change the partition on which the installation will take place.
• Finally, you restart the installation with a double-click on the icon.

• ### During the installation, I get the message 'Failed to install hardlock.cat signature'.How can I fix this?

FAQ 003451 EN-US

The license drivers are digitally signed. If you try to install a new license driver that is missing in the existing signature of your operating system, a message appears.
To solve this problem, please perform a Windows update. After having restarted the operating system, the installation should be completed.
• ### In RF-PLATE-BUCKLING, the reduction factor for consideration of the column buckling χc is calculated by the modified slenderness ratio of sheet metal plate ${\overline{\mathrm\lambda}}_{\mathrm p}$. Why is it not calculated with the slenderness ratio of the subsection ${\overline{\mathrm\lambda}}_{\mathrm c}$ ?

FAQ 003366 EN-US

The RF-PLATE-BUCKLING performs the plate buckling analysis according to Chapter 10 "Reduced Stress Method" of EN 1993-1-5. According to EN 1993-1-5, 10 (5) a), it is necessary to determine all reduction factors with the modified slenderness ratio of the plate panel ${\overline{\mathrm\lambda}}_{\mathrm p}$ according to Equation (10.2).
• ### RSTAB and RFEM crash when the program starts. I have installed the BitDefender antivirus software on my computer. What is the reason?

FAQ 002997 EN-US

The problem was caused by an incorrect update of the BitDefender signature database. To correct the problem, update the BitDefender signature database.

• ### If new versions of RSTAB and RFEM are installed using msiexec, will the old versions be overwritten?

FAQ 002940 EN-US

No, the old versions will not be uninstalled. Thus, several versions of RFEM can be used simultaneously on the computer, which makes sense in many cases.

If you want to uninstall an old RFEM version, you can do so with the following command:

msiexec -x <old MSI package>

For a complete list of all msiexec capabilities, use the following command:

msiexec -h
• ### Is there a possibility to select "Members" and to apply the geometry as a panel and its internal forces into the module?

FAQ 002906 EN-US

Yes, that is possible. If the add-on module PLATE-BUCKLING is not opened as a stand-alone version, but via RSTAB or RFEM, the panels (c/t parts of a member cross-section), as well as the respective load cases in PLATE-BUCKLING of the RSTAB or RFEM Models, can be loaded (see picture).

• ### I use the add-on module PLATE-BUCKLING and need more detailed information on how the critical buckling stress for buckling behavior is calculated. The stiffeners end before the edges. Is the eigenvalue of the buckling analysis calculated as a member with the effective plate width?

FAQ 002793 EN-US

If your buckling stiffeners are not defined within the complete length of buckling panel, the PLATE-BUCKLING program will automatically generate this stiffness as equivalent member incl. effective width and performs eigenvalue analysis by the BUCK Add-on Module. The result of it is the critical buckling stress of the member and thus of the stiffness. The length of the equivalent member is the stiffener length itself. It is currently not possible to display the internal results in detail.

• ### Is it possible to "borrow" licences from the server?

FAQ 002636 EN-US

No, our current licensing system has no lending function – regardless of the physical (hardlock, USB dongle) or digital (softlock) software protection variant.

In contrast to the physical variant, the digital software protection technology also provides a "rehost" function in order to transfer the digital software protection system from one computer to another. However, this transfer does not mean it is possible to transfer a single license for a particular program of our product range, but the entire licensing that is controlled by the respective softlock. Thus, you can only transfer the digital software protection to another computer by plugging the physical software protection key to another computer.

• ### When importing the authorization file, I get the error saying that the authorization file cannot be copied to the destination folder. What should I do?

FAQ 002620 EN-US

A user must have the read and write permissions for the destination folder. This folder is specified in the error message (see Figure 01).

Please set the required permissions to this folder. To do this, select the folder and open its properties. In the "Security" tab, you can then, for example, set full access for the "Users" group or for the selected users (see Figure 02).

Now, it should be possible to import the license file. The required user rights can also be found in the User Rights document that is available under Downloads below.

As an alternative, you can start the program as an administrator by using the "Run as Administrator" command in the shortcut menu of the program icon (see Figure 03). Then, import the current license file.

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If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

#### First Steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

#### Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

#### Your support is by far the best

“Thank you very much for the useful information.

I would like to pay a compliment to your support team. I am always impressed how quickly and professionally the questions are answered. In the industry of structural analysis, I use several software including service contract, but your support is by far the best.”