Missing element US3

hi,

reading documentation, i need a try new shell element in CCX 2.18. but seems not available yet. any hints about the problem?

thank you,

i checked again, previously input was not defined properly.

*USER ELEMENT,TYPE=US3,NODES=3,INTEGRATION POINTS=3,MAXDOF=6

now it’s ran and finish, however no result exist on frd files (graphically shown blank) even i request by Output=2D