Revit doesn’t let you tag Wall Volume by default, so Avisotskiy puts RDBLink to good use – he uses Microsoft Access to update a Shared Parameter with the wall Volume data, and then simply uses a tag to grab the manually updated and manually created Volume data.

This is not a ‘live’ link, but it shouldn’t take too long to round trip the project to update the Volume information prior to document transmission or printing.

From his blog:
Revit does not allow to directly make a mark in the volume of the object.

4. Unload in Access, using the Query Designer update the “_Obem”, taking data from the parameter “Volume”.

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