modify turtle_teleop_key to control mavros [closed]

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HI

I wonder make a node to send control information to mavros.

So I modify the teleop_turtle_key.cpp which is a node with turtlesim example.

What I modify is it's publisher topic "turtle1/cmd_vel" into "/mavros/setpoint_attitude/cmd_vel".

But! when I push the botton on my keyboard, the "teleop_turtle_key" node crush everytime and shows error.

[ERROR LOG]===========================================

[ERROR LOG]===========================================

How could I solve it ? I have been tried to modify datatype but not works.