Sometimes they are referred to as features, sometimes “bugs,” and other times by the harsher term “defect.” By whatever name, PowerPivot for Excel contains the sometimes curious sort behaviors common to any complex software product in the initial release.
Disabled PowerPivot Add-In
Upon starting Microsoft Excel, you may find the PowerPivot ribbon item is missing, as illustrated in Figure 11-1. It is, of course, exceedingly difficult to do work in PowerPivot for Excel without the PowerPivot ribbon menu. The missing PowerPivot ribbon menu is the principal symptom of a disabled PowerPivot add-in.
Figure 11-1. Missing PowerPivot ...