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Which MicroStation Version supports which DWG/DXF version format and how can I find out the version format of certain DWG/DXF files?
Since V8i versions it is possible to install several "RealDWG" version Updates to support higher RealDWG version formats. see: Bentley V8i (SELECTseries 4) - Autodesk® RealDWG™ 2016 FAQConfiguration variable MS_REALDWG_VERSION needs to be used to switch between "RealDWG 2016", "RealDWG 2014", "RealDWG 2013", "RealDWG 2012", and "RealDWG 2009".For more details see: Bentley V8i - Autodesk® RealDWG(TM) FAQ and Enable "RealDWG 2016" Update for DWG 2015/2016 format in SS3
The DWG/DXF format version could be find out by opening the DWG/DXF file with the texteditor. At the beginning of each DWG/DXF file is a number that starts with "AC".Here is a list of AC-numbers and their related AutoCAD-Versions:
Enable "RealDWG 2016" Update for DWG 2015/2016 format in SS3Bentley V8i (SELECTseries 4) - Autodesk® RealDWG™ 2016 FAQBentley V8i - Autodesk® RealDWG(TM) FAQ
AutoCAD versionsAutodesk Knowledgebase - Drawing version codes for AutoCad