Specifies the file to be closed. Individual files can be selected or the default of *ALL can be nominated. For more information, refer to the section on Specifying File Names in I/O Commands.
Specifies the name of a field that is to receive the "return code" that results from the I/O operation.
If the default value of *STATUS is used the return code is placed into a special field called #IO$STS which can be referenced in the RDML program just like any other field.
If a user field is nominated to receive the return code it must be alphanumeric with a length of 2. Even if a user field is nominated the special field #IO$STS is still updated.
For values, refer to I/O Return Codes.
Specifies what action is to be taken if an I/O error occurs when the command is executed.
An I/O error is considered to be a "fatal" error. Some examples are file not found, file is damaged, file cannot be allocated. These types of errors stop the function from performing any processing at all with the file involved.
If the default value of *ABORT is used the function will abort with error message(s) that indicate the nature of the I/O error.
*NEXT indicates that control should be passed to the next command. The purpose of *NEXT is to permit you to handle error messages in the RDML, and then ABORT, rather than use the default ABORT. (It is possible for processing to continue for LANSA for i and Visual LANSA, but this is NOT a recommended way to use LANSA.)
ER returned from a database operation is a fatal error and LANSA does not expect processing to continue. The IO Module is reset and further IO will be as if no previous IO on that file had occurred. Thus you must not make any presumptions as to the state of the file. For example, the last record read will not be set. A special case of an IO_ERROR is when a trigger function is coded to return ER in TRIG_RETC. The above description applies to this case as well.
Therefore, LANSA recommends that you do NOT use a return code of ER from a trigger function to cause anything but an ABORT or EXIT to occur before any further IO is performed.
*RETURN specifies that in a program mainline control is to be returned to the caller and in a subroutine control is to be returned to the caller routine or the program mainline.
If none of the previous values are used you must nominate a valid command label to which control should be passed.
