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If a user field is nominated to receive the return code it must be alphanumeric with a length of 2. Even if a user field is nominated the special field #IO$STS is still updated.
For values, refer to I/O Return Codes .
| IO_ERROR |
|---|
Specifies what action is to be taken if an I/O error occurs when the command is executed. This parameter is only valid for printer files opened by the UPRINT command.
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