Pointing to main three observations -
1. The structure is defined as "STAAD TRUSS", thereby defining all the members of the frame as Truss member. This is creating instability issues in the structure.
2. The Member Releases are defined for practically all the members, but no member is there to carry the bending moments developed to transfer to the foundation.
3. The Master-Slave relation defined may be reviewed, with respect to the connectivity relation and directions.
Please refer to the modified model attached.(Please visit the site to view this file)