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Positions 71-72 (File Condition)

Entry
Explanation

Blank
The file can be used by the program, and, if it is an input file, the file is opened.

U1-U8
The file can be used by the program when the indicator is on; it is ignored when the indicator is off.

UC
Programmer control of first open. If a file is to be initially opened by the OPEN operation in the calculation specifications, then a UC entry causes the file not to be opened at program initialization. This entry is not valid for input files designated as primary, secondary, table, or record-address files, or for output files conditioned by the 1P indicator.

An entry of U1 through U8 in positions 71 and 72 lets the programmer control the operation of input, output, update, and combined files at run time. If the specified indicator is on at program initialization, the file is opened. If the indicator is not on, the file is not opened and is ignored during processing. The U1 through U8 indicators can be set as follows:

The UC entry is required for programmer control of only the first file opening. If a file is opened and later is closed by the CLOSE operation, the programmer can reopen the file (by the OPEN operation) and the UC entry is not required in positions 71 and 72.


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