data specification of concatenated file aa...aa is incorrect.

The logical terminal name, map name, or message type of the concatenated mcf data file is incorrect.

aa...aa: mcf data file name (string of up to 255 characters)

S: Stops the reading of data from this file and waits for input of a file name.

O: After storing valid data into the file, enter the file name.

To stop the test, enter the end command.