我们在这里为初学者提供了重要的提示和建议，以便用户更加容易快速的掌握使用我们的基本软件 RFEM 和 RSTAB。
- LC/S + LC/S
- factor * LC/S or factor * LC/S
Detailed explanation is possible on the second definition variant, for example: A load combination was calculated according to the second-order analysis. Results show a nonlinear relation, which should not involve doubled axial force with doubled moment at the same time, for example. Now, if you add a factor to the lod combination results, it multiplies each internal force. This conflict (nonlinear calculation of results and the subsequent linear multiplicartion) causes the warning appears.