RobotStudio event

Cannot log TCPx, y,z under OnlineAnalyzer

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My robot arm model is IRB 2600 1.65/20, and Robotstudio connected to it via Ethernet cable.
I've tried to log the TCPx, y and z through online analyzer, but it didn't work. (the following  picture's URL)
https://drive.google.com/file/d/1hRaC7jyNopnZ4BcV6tPHLfqZkRe4XwIQ/view?usp=sharing

However I've tried to log position of joints, and it did work. (the following picture's URL)
https://drive.google.com/file/d/1pBlo2jbgQ2E_yv12D-_tfz1SuPqOr5oE/view?usp=sharing

Why cannot I log the TCP ?
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