Failed to write curved geometry to SDE Geodatabase on Oracle

I'm trying to import some MicroStation DGN data into an SDE Geodatabase (Oracle).

 

 

My workflow is built specifically to preserve curved geometries, and when I write to a File Geodatabase, these are intact. However when I write to an SDE Geodatabse these are stroked into straight line segments.

 

 

Looking at the logs I get the following warnings: WARN  |Required columns 'GLOBAL_ID, OBJECTID, ' not specified for predefined table 'GISOWNER.TEST'.  Using Definition from Database

 

WARN  |DEF line for the table 'GISOWNER.TEST' not fully specified. As a result, existing table definitions will be used

 

WARN  |Existing SDE table 'GISOWNER.TEST' allows the following shapes: SDE_NIL SDE_LINE SDE_SIMPLE_LINE SDE_MULTIPART . Shapes specified in mapping file for table allows: . Defined shape types don't match.

 

WARN  |Spatial column name for existing table 'GISOWNER.TEST' is 'SHAPE' while value specified in mapping file is ''. Using existing column

 

WARN  |Existing table 'GISOWNER.TEST' does support CAD but mapping file specification for layer doesn't!

 

WARN  |Existing table 'GISOWNER.TEST' has 64 bit precision but mapping file specifies 0 bit precision for the layer! Using existing table's definition.=======

 

I'm pretty sure I had this working before, so I must have inadvertantly changed something...

 

 

I suspected that the SDE polyline feature class that I was writing to couldn't handle curved geometries - for whatever reason. But I was still able to create curved geometries in the feature class with ArcGIS Desktop.

 

 

Any suggestions? Thanks.