The most common cause is a lack of user rights.
Open RFEM or RSTAB by right-clicking the icon. In the shortcut menu, select the "Run as Administrator" option. Then, load the authorization file again using the menu "Help → Authorization".Question
Although the current authorization file has been loaded, the program runs as a demo version.
Mr. Baumgärtel provides technical support for Dlubal Software customers.
![Roundup Function](/en/webimage/010182/3051809/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![Hybrid Cross-Section in SHAPE-THIN](/en/webimage/010292/3043707/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![Specifying Default Program in Project Manager](/en/webimage/010306/3042590/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![Print Options](/en/webimage/010323/3034815/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![Steels according to the Australian standard AS/NZS 4600:2005 in the material database](/en/webimage/006816/1584844/1356-en-png.png?mw=512&hash=71078e1c67a8e5709fa8b557bdb4e112b35390a6)
The material database in RFEM, RSTAB and SHAPE-THIN contains steels according to the Australian standard AS/NZS 4600:2005.
![Feature 002843 | Dimensioning with Result Function](/en/webimage/051576/3982510/1.png?mw=512&hash=9d7f6c198b6d4ae6ee8f2fa8bca75f85579e14c9)
For design objects, you can optionally display sags or extreme results.
![Feature 002423 | Displaying Results in Solids](/en/webimage/031923/3325382/FE_Solid_EN.jpg?mw=512&hash=d2950a5e2123942fab13aad296e814c67695c955)
The results of solid stresses can be displayed as colored 3D points in the finite elements.
![Improved Calculation Performance by Optimized Consideration of Nodal Degrees of Freedom in RFEM](/en/webimage/015531/2983511/Berechnungsperformance_EN_(1).png?mw=512&hash=ea9bf0ab53a4fb0da5c4ed81d32d53360ab2820c)
The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.
This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (for example, trusses and membrane structures).