Some or all of the calculation analysis information becomes out-dated when you edit the model. Click Calc All () to run a new analysis calculation. If the Calc All option is grayed-out (), the analysis results are current.

When you recalculate, the analysis starts from the point where the information is no longer valid. For example, if you were to add a load, it would not affect the stiffness matrix. The recalculation would start with the analysis of loads and then move on to design. If you were to edit the concrete elements however, the calculation would start from the beginning.