Invalid special command received
An executor received a command that was invalid, or unexpected in the context it was received. The command is ignored. This error is generated if the 3270 controller or executor process is already processing a normal command on a specific session, in which case they will only acknowledge and process particular special commands including enable, disable, quiesce, and abort script. The usual case is trying to enable a session while the executor is already processing an enable request.
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