PTX 2.0 .struct

Hi there

According the the PTX ISA 2.0 p. 37, it is possible in PTX to make a typedef structure with the .struct keyword. However, I cannot get this to work. I’m using a compute capability 2.0 card, and have .target sm_20 set in the code. Does anyone know if this feature is simply not in yet, or if the problem is at my end?