COBOL Manual for TNS/E Programs (H06.08+, J06.03+)

for a line sequential file:
extfile
is the file description file name of a sequential file to open in EXTEND mode, for write
operations that append records to the file. The file is positioned after the last logical
record when opened. All operations on the file must be write operations, as if the file
had been opened in OUTPUT mode. If the file is an Enscribe unstructured file, its size
must be a multiple of the record size.
TIME LIMITS, SHARED, PROTECTED, EXCLUSIVE, sync
are the same as described earlier for infile.
Usage Considerations:
• Associating COBOL File Names With System File Names
Before you can open a file, you must associate its COBOL file name with the name of a system
file name, using one of:
◦ The ASSIGN clause of the file-control entry for the COBOL file (see FILE-CONTROL
Paragraph (page 115))
◦ The TACL command ASSIGN (see ASSIGN Command (page 582))
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