Prismatic beam properties not coming through on GetBeamProperty

I am querying a beams section properties. The beam has a Prismatic section, detail from input file below:-

TABLE 1
UNIT MMS NEWTON
PRISMATIC
FLRANG
2217.8 4.19408e+06 2.99022e+06 7.1843e+06 667.7 481.8 126.3 120
END

When I use the GetBeamProperty however the depth, width, Ay and Az are all zero

Any ideas?