You must install the Database Interference Detection Service option to monitor interferences. See Smart 3D Installation for information about installing and configuring this service.
The user account running the IFC Windows service must have at least Read access to
the SharedContent folder. Otherwise, IFC generates a bad part marker with clashes against structural fireproofing.
The software displays Interference Server 
under the model node in the Project Management tree. After the proper access permissions
are configured, you can start and stop the Database Detect process from any computer
on which the Project Management option is installed.
For the IFC Database Detection process to run correctly, permissions must be set on the model and model permission groups according to the following guidelines:
Log on privileges for the IFC Administrator include:
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Write access to the model database at a minimum.
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Full Control permissions or access on a minimum of one permission group.
In Project Management, create a new permission group folder and permission group
under the model icon to store the IFC results. See Create IFC permission group folder and permission group.
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Read access on all other model database permission groups at a minimum.