Internal Flags

IOINIT uses labeled common to communicate with the runtime I/O system. It stores internal flags in the equivalent of the following labeled common block:

    INTEGER*2 IEOF, ICTL, IBZR 
    COMMON /__IOIFLG/ IEOF, ICTL, IBZR ! Not in user name space

In releases prior to SC 3.0.1, the labeled common block was named IOIFLG. The name changed subsequently to _ _IOIFLG to prevent conflicts with any user-defined common blocks.