A colleague reported the following issue in RFEM 6.
When using rectangular plate / flat bar sections, the Steel Design module runs only if the Z-axis is defined as the minor axis.
If Z is the major axis, Steel Design stops with the error:
“Check of lateral-torsional buckling is not available because z-axis is major”
This happens purely because of the section axis definition.
The geometry itself is valid, but Steel Design does not run unless the section is defined with Z as minor.
There is no warning during section definition, the error appears only when running Steel Design.
