Invalid result after reading STEP file.

Invalid result after reading STEP file is due to invalid interpretation of
entities:
 #0000019 = ( CONVERSION_BASED_UNIT( 'RADIAN', #0000033 )NAMED_UNIT( #0000035
)PLANE_ANGLE_UNIT( ) );
#0000033 = PLANE_ANGLE_MEASURE_WITH_UNIT( PLANE_ANGLE_MEASURE( 1.00000000000000 ),
#0000047 );
#0000047 = ( NAMED_UNIT( #0000035 )PLANE_ANGLE_UNIT( )SI_UNIT( $, .RADIAN. ) );

in the method STEPConstruct_UnitContext::ComputeFactors()