You have given UBC command but you have not define loading under that command. And if you do analysis for this you will get error.
DEFINE 1893 LOAD
ZONE 0.24 RF 5 I 1 SS 2 ST 1 DM 0.05 DT 1.5
1893 LOAD X
1893 LOAD Z
In above command neither you have define selfweight, member load, point load, floor load . than you will get error when you do analysis.