Setting TCP KeepAlive with BG600L retuns error

Hi,

I am trying to set the TCP KeepAlive with the QICFG AT command for the BG600L but I receive an error return

AT+QICFG="tcp/keepalive",1,600,600,9

Can you advise please?

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Thanks Herbert - MINUTES ! I see. many thanks for coming back to me on this