DGNIMPXREFIMPORTMODE system variable

External references import mode

Specifies how to import dgn reference attachments. The options are "Omit" - don't import dgn reference attachments; "Retain" - convert attached dgn files to dwg and create dwg Xref; "Merge to cell" - create block definition and import attached dgn file to it, then create block reference to dgn attachment block; "Create DGN Underlay" - create DGN Underlay object.

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