When the FILE STATUS is not specified on a file, any read operations on the file should handle the "AT END" or "INVALID KEY"
conditions.
Noncompliant code example
SELECT MY_FILE
ASSIGN TO 'foobar.txt'
ORGANIZATION IS SEQUENTIAL.
...
READ MY_FILE
NOT AT END PERFORM COMPUTE_LINE
END-READ.
Compliant solution
SELECT MY_FILE
ASSIGN TO 'foobar.txt'
ORGANIZATION IS SEQUENTIAL.
...
READ MY_FILE
NOT AT END PERFORM COMPUTE_LINE
AT END MOVE 'Y' TO EOF-FLAG
END-READ.
