The ASYNCHRONOUS specifier asks whether asynchronous I/O is in effect. It takes the following form:
ASYNCHRONOUS = asyn
Is a scalar default character variable that is assigned one of the following values:
'NO' |
If the file or unit is connected and asynchronous input/output is not in effect. |
'YES' |
If the file or unit is connected and asynchronous input/output is in effect. |
'UNKNOWN' |
If the file or unit is not connected. |