Isaac Sim ROS Error

Hello, I’m training and testing 4-differential Robot through ROS at Isaac Sim. However, if you reset the world after a certain step in the current test stage, the ros command does not work. I would appreciate it if you could suggest a good solution to this.

The error message is below:
2023-03-12 09:22:36 [26,698ms] [Warning] [omni.isaac.core.articulations.articulation_view] Physics Simulation View is not created yet in order to use apply_action

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