(I64 only.) The End Call Tracing Operations routine should be
    called at the conclusion of call tracing operations to free the
    memory used to process unwind descriptors.

    Format

      LIB$I64_PREV_INVO_END    (invo_context)

1 - Returns

    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value

2 - Argument

 invo_context

    OpenVMS usage:invo_context_blk
    type:         structure
    access:       modify only
    mechanism:    by reference

    Address of a valid invocation context block previously used for
    call tracing.