Topic Path: Symbol Reference > Constants > ErrIllegalOperation Constant
ErrIllegalOperation Constant

This constant corresponds to the "Illegal TFTP Operation" error code (value is 1) in TFTP protocol.

ErrIllegalOperation = 4;

An exception will be raised in the server if it receives a non-expected opcode and this code will be sent to the client. Basically, if the first opcode is not WRQ (Write request) or RRQ (Read request).

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