For the Sys.Udata[x] stucture this seems to work
ptr pUdata(8)->u.user:$24.0.32+
// OR u.user:36.0.32+
// OR u.user:36+ ,if not using offset or setting the maximum size
pUdata(0),8
M8192=0
M8193=0
M8194=0
M8195=0
M8196=0
M8197=0
M8198=0
M8199=0
M8192,8->
M8192->u.user:$24
M8193->u.user:$28
M8194->u.user:$2c
M8195->u.user:$30
M8196->u.user:$34
M8197->u.user:$38
M8198->u.user:$3c
M8199->u.user:$40
Sys.Udata[9]=9,10,11,12,13,14,15,16
pUdata(0),8
M8192=9
M8193=10
M8194=11
M8195=12
M8196=13
M8197=14
M8198=15
M8199=16