Error in applying moving load to a truss model

I have designed a truss model as a planar frame and assigned truss specification to all the members. When i apply the moving load and run the analysis the moving load is not applied on the structure and shows the following warnings

**WARNING-NO MEMBERS IN SPECIFIED VERTICAL RANGE.

**WARNING- CONSECUTIVE ANALYSIS COMMANDS. ONLY FIRST USED.

**WARNING - THERE WERE MORE THAN 12 DOF WITH ZERO STIFFNESS.

*WARNING- ZERO STIFFNESS IN DIRECTION 6 AT JOINT 4 EQN.NO. 18

Matlab truss-1.std