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Please help me with this issue. : Send this instruction using the at_cmd_write function: AT-CGDCONT? Returns an error value

I sent the AT instruction back correctly with the serial tool sscom5.13.1

I sent the AT instruction error with the secondary function:
at_cmd_write ("AT-CGDCONT?," buf, sizeof (buf), s.at_state);

Attachments are serial tools and code

15_hello_world_at_lte.rar

sscom5.13.1.rar

See figure below for testing

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