我从架子上拿出了一个旧的 ASA5550，上面装有 8.4(2)。当我尝试启动它时，出现以下错误...

-----------------------------------------------
Traceback output aborted.
Flushing first exception frame:
Abort: Assert failure
    vector 0x00000000
       edi 0x00000002
       esi 0x0973a2dc
       ebp 0x09fceef8
       esp 0x09fceeec
       ebx 0x00000187
       edx 0x09fcef30
       ecx 0x00000006
       eax 0x00000000
error code n/a
       eip 0xdd6a62a1
        cs 0x00000073
    eflags 0x00003246
       CR2 0x00000000
Nested traceback attempted via signal, from:
Abort: Assert failure
    vector 0x00000000
       edi 0x09fce92c
       esi 0x09fce9cc
       ebp 0x09fce7f8
       esp 0x09fce7ec
       ebx 0x00000187
       edx 0x09fce834
       ecx 0x00000006
       eax 0x00000000
error code n/a
       eip 0xdd6a62a1
        cs 0x00000073
    eflags 0x00003203
       CR2 0x00000000

An internal error occurred.  Specifically, a programming assertion was
violated.  Copy the error message exactly as it appears, and get the
output of the show version command and the contents of the configuration
file.  Then call your technical support representative.

assertion "_vf_mode_init" failed: file "vf_api.c", line 99

当你得到时有什么问题assertion "_vf_mode_init" failed: file "vf_api.c", line 99？

谷歌搜索出现了很多GNS3讨论和这个Cisco 支持论坛案例，但没有找到问题 AFAICT 的根本原因。