d24578b676
The order number written to Alembic is the same as we use in memory, so the +1 wasn't needed, at least according to the reference Maya exporter maya/AbcExport/MayaNurbsCurveWriter.cpp, function MayaNurbsCurveWriter::write(), in the Alembic source code. Furthermore, when writing an array of nurb orders, the curve type should be set to kVariableOrder, otherwise the importer will ignore it.