[Cause]
An invalid host entry. If the first number is 1, the invalid name is in the local host table. If the first number is 2, the invalid name is in the shared host table. The second number indicates which entry in each table has the invalid name.
[Countermeasure]
Set the robot name worksheet correctly on the Host Communication → TCP/IP screen. Host names can contain letters (A-Z, a-z), digits (0-9), negative
sign (-). Blank characters, spaces, and underscores ( _ ) cannot be used. The first character must be a letter. The last character must be a minus sign.