The End-of-File Scan routine is called after each sequence of
    calls to LIB$FILE_SCAN. LIB$FILE_SCAN_END deallocates any saved
    OpenVMS RMS context and/or deallocates the virtual memory that
    had been allocated for holding the related file specification
    information.
    Format
      LIB$FILE_SCAN_END  [fab] [,context]
1 – Returns
    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value
2 – Arguments
 fab
    OpenVMS usage:fab
    type:         unspecified
    access:       modify
    mechanism:    by reference
    File access block (FAB) used with LIB$FILE_SCAN. The optional fab
    argument is the address of the FAB that contains the address and
    length of the file specification.
 context
    OpenVMS usage:context
    type:         longword (unsigned)
    access:       modify
    mechanism:    by reference
    Temporary default context used in LIB$FILE_SCAN. The optional
    context argument is the address of a longword containing this
    temporary default context.