For MicroStation V8i (SELECTseries 3 + 4) and Power V8i (SELECTseries 3 + 4) versions an "REALDWG 2016" Enhancement / Update is provided in Software Downloads (http://select.bentley.com/FulfillmentCenter) to support DWG 2015/2016 version formats.See also: Bentley V8i (SELECTseries 4) - Autodesk® RealDWG™ 2016 FAQAfter installation of this update DWG/DXF 2015/2016 file format versions are not available / displayed in Save as DWG/DXF Options.
If your product is not automatically ready to use RealDWG 2016 after you install this update, such as in case of MicroStation V8i (SELECTseries 3), you must add the MS_REALDWG_VERSION configuration variable and set it to 2016 to enable it.
The steps above saves the variable in UCF file of current used user.It is also possible to save this variable in any configuration file (UCF, PCF, CFG).This configuration variable is also used to switch between "RealDWG 2016", "RealDWG 2014", "RealDWG 2013", "RealDWG 2012", and "RealDWG 2009".This might be needed in order to use certain object enablers which are depend on a certain RealDWG version.So you don´t have to remove the update from your systems and just need to set this variable to the needed RealDWG format number.
RealDWG 2015 libraries
Bentley V8i (SELECTseries 4) - Autodesk® RealDWG™ 2016 FAQ