In batch, the job controls the sequential files. They are opened at the FOR statement and closed at the ENDFOR statement. However, in the online environment, CA Ideal cannot control sequential files because multiple users might be accessing the files at the same time. To ensure file integrity, CICS controls sequential files accessed by transactions running online. This means that CICS opens and closes sequential files that CA Ideal uses online and, until CICS closes the files, they cannot be read in batch.
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