Mitsubishi Electric MELFA CR750 Series User Manual page 457

(3)
The communication time is taken very long when using the backup etc.
In Windows Firewall setting, if inbound communication of Communications Server 2 (RoboCom.exe) is
blocked, change to allow the connection.
Check item or cause
If there are one or more "RoboCom" lines in
[Inbound Rules] of [Windows Firewall] -
[Advanced settings] screen, is [Allow the
connection] selected of all these lines?
(4)
Spline files cannot be saved.
See "(3) The communication time is taken very long when using the backup etc.".
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Solution
If there are "RoboCom" lines selected [Block the
connection], change them to [Allow the connection].
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