Excel Service Not Running on Your SharePoint
If you got this message on your SharePoint, you can following this step :
1. Open Central Administration > Operations tab > Service on server
Ensure that the Excel Service is running
2. Open Central Administration -> go to your configured Shared Service -> add new trusted file location
- field URL: here you can specify a report library or the whole portal
- Location Type: should be Windows SharePoint Services
- Children trusted: defines whether the children should also be trusted or only the definied path
I have been using this step and finnaly my Excel Service now is running