Hi all, I have URDF file created in solid-works than converted to URDF. I have created to two launch files one for gazebo and another for rviz. When gazebo file is launch it work perfectly fine but when i launch the rviz file i couldnt get error on the fixed frame Unknown frame map. Even after i opened a robotmodel I get this error {No transform from [LINK_1] to [map]} could someone pleasehelp me out to resolve this.