The frame analysis of the structure is initiated by selecting the Process-Analyze command. A dialog box provides the user with the ability to select the load cases that will be considered in the analysis. If the previous analysis of any of the load cases is still valid, those load cases will already be selected. This provides a way of determining whether or not an analysis needs to be performed. Each time Analyze is invoked, the results of the previous analysis are over-written; only the results for the load cases included in the most recent analysis will be available for viewing, outputting, or post-processing. Select or deselect the cases as desired.

Adjacent to each load case is a status light. It is either green or red. A green light indicates that the load case can be selected and analyzed. A red light indicates that the load case cannot currently be selected and analyzed. This may be due to the diaphragm setting in Criteria - Diaphragm or due to the lack of, or incomplete, mass or exposure data.

The status indicator light in the bottom right hand corner of the status bar indicates the current status of the database. It will generally be green immediately after an analysis. See "Analysis Status" for more information.