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• ### After downloading the installation file, an error message appears saying "The setup file is defective" when you run it. What can I do?

New FAQ 003619 EN-US

• ### When starting the project manager according to FAQ 002927 , all files are displayed by default. How can I set the option to only display RFEM files without having to click RFEM each time?

New FAQ 003610 EN-US

In this case, start the project manager from the respective program (RFEM, RSTAB ...). Thus, if the project manager is started directly from RFEM, only RFEM files are displayed by default, see Figure 1.

• ### I have a student license for RFEM, can I also license for other programs such as CRANEWAY?

New FAQ 003602 EN-US

The license that Dlubal grants to students includes all of the standard programs, including add-on modules. Just download the required program installation from your account on our website (see video), install it and run it. The only exception is the SHAPE-MASSIVE program, which for technical reasons is only available with a hardware key.
• ### SHAPE-THIN calculates a very small shear area. What is the reason for this?

New FAQ 003547 EN-US

The shear area is calculated as follows:

${\mathrm A}_{\mathrm y}\;=\;\frac{{\mathrm I}_{\mathrm z}^2}{\int_{\mathrm A^\ast}\left({\displaystyle\frac{{\mathrm S}_{\mathrm z}}{\mathrm t^\ast}}\right)^2\operatorname d\mathrm A^\ast}$

${\mathrm A}_{\mathrm z}\;=\;\frac{{\mathrm I}_{\mathrm y}^2}{\int_{\mathrm A^\ast}\left({\displaystyle\frac{{\mathrm S}_{\mathrm y}}{\mathrm t^\ast}}\right)^2\operatorname d\mathrm A^\ast}$

Where:

 Iz or Iy: second moment of area in relation to the axis z or y Sz or Sy: first moment of area in relation to the axis z or y t*: effective element thickness for shear transfer A*: surface area based on effective shear thickness t*

The effective element thickness for shear transfer t* has a significant influence on the shear area. Therefore, the defined effective element thickness for shear transfer t* (Figure 1) of the elements should be checked.

• ### I get an error message saying that no material is assigned to one or more point elements. How to solve this problem?

New FAQ 003517 EN-US

To prevent the error message (Figure 1) from appearing and the calculation to be started, it is necessary to assign a material to the corresponding point elements as follows:

• Right-click the entire cross-section: 'Reduce Cross-Section into Elements', Figure 2

• Selection of the corresponding elements or all point elements with the status ‘Insert’ by using the Views navigator, because it is only possible to define a material for them (in contrast to point elements with the ‘Remove’ status)
• Assign the corresponding material and confirm with OK, Figure 3

• Deactivation of visibility
• Select all elements and right-click one of the selected elements: 'Create Cross-Section from Selected Elements', Figure 4

• ### How to change the exponential display of the results to display of integral numbers?

New FAQ 003516 EN-US

If the results are not displayed exponentially (Figure 1) but as integers, the number of decimal places must be minimized, see Figure 2: Menu 'Options', 'Units and Decimal Places'.

Another option would be to change the unit from, for example, 'mm' to 'cm'.

• ### After starting the program as a full version and working with it for a certain period of time, an error message appears saying that the authorization failed when saving the file. What is the cause and how can I save my file anyway?

New FAQ 003513 EN-US

First information beforehand: If the program was started as a full version, it does not jump into the demo mode if the license cannot be found during the calculation or saving process.
It remains in waiting stage until the license is available again.

It is then necessary to distinguish the type of licensing.
For the single-user license, it should be checked if the hardlock was installed on the computer and if the indicator light situated at the end of the dongle is visible. If not, another USB port - preferably directly on the PC - should be used.

In case of a network license, the problem might be caused by a failure in the network connection. In the web-based license user interface http://localhost:1947/_int_/devices.html, it should be checked if the license key is available there.
Additionally, it is possible to look at the http://localhost:1947/_int_/features.html to see if a free license is available for the desired program or add-on module.

If the licensing problem persists, you can create a diagnostic report from the warning message. Send it to our client support.
• ### I have tried to check the cross-section properties of rolled cross-sections in SHAPE-THIN and had to find out that there are deviations when determining the torsional moment of inertia It for the tables. How to explain it?

New FAQ 003499 EN-US

When determining the torsional moment of inertia, point elements are not considered for It in the analytical equations. Therefore, it is possible to apply a correction factor for cross-sections with distinct fillets such as rolled cross-sections, to determine the effect of the point elements. Figure 01 shows recommendations for different types of rolled cross-sections. This correction factor can be adjusted in the calculation parameters. In addition, the torsional moment of inertia can also be calculated with the FE method, which also covers the effect of point elements and welds. This approach requires slightly more computing time than the analytical calculation.
• ### I have imported a SHAPE-THIN cross-section into RSTAB/RFEM. How is it possible to update the cross-section in RSTAB/RFEM if the cross-section has been changed in the SHAPE-THIN program?

FAQ 003483 EN-US

The modified cross-section must be reimported into RSTAB/RFEM. To do this, click the 'Import Cross-Section from Program SHAPE-THIN' button in the 'Edit Cross-Section' dialog box and select the modified SHAPE-THIN cross-section. The query of overwriting the cross-section should be answered with 'Yes' (Figure 1).
• ### During the installation, I get a message from the installation wizard that another installation is in progress right now, and the current installation cannot continue. What can I do?

FAQ 003478 EN-US

Make sure that no planned installation is currently performed. In the Task Manager, this can be displayed as an active app and as a background process called 'Windows Installer'.
If a Windows Installer is still displayed in the Task Manager after restarting the computer, it can be selected and closed by clicking the 'End Task' button.
Then, the desired installation can be carried out.

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