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artc2
en respuesta a: cadffm

There were never any "AC1800" or "AC1800a" string version values in a dwg or dxf file. There are kDHL_1800a and kDHL_1800 enum values in ObjectARX that are just names for integer numeric version values that are used in dwg files. The kDHL_1800a value (numeric value of 24) was a development version value for AutoCAD 2004. kDHL_1800 (numeric value 25) was late development and also the final version value for AutoCAD 2004.

The corresponding string version values are:

kDHL_1800a "AC402a"
kDHL_1800 "AC402b" (late AutoCAD 2004 development)
kDHL_1800 "AC1018" (final shipping AutoCAD 2004)