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Getting this error when i try and open an excel spread sheet as a web page: 'Excel Web Access: An error has occurred. Please contact your system administrator if this problem persists'

two questions:

  1. what is the relation between excel calculation services and excel services? and

  2. should excel calculation services be running on farm for excel web access to work, even if all i want is to display spread sheets and not do any calculations?

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up vote 4 down vote accepted

You need Excel Calculation Services (ECS) to run Excel Web Access (EWA). See ECS as the backend of EWA.

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