Domino 6.5.4 备份的问题？

stor_man

我采用Legato NetWorker备份Domino 6.5.4时产生以下错误信息
NOTES: The call to NotesInitExtended failed: 272 (notes_sess_open|1235|7890|6)。
我在Legato 手册上查到以下内容：
Error message: The call to NotesInitExtended failed:Notes_API_error_number.
Action:The NML software cannot initialize the Notes session.
To resolve the error, locate the error message for the given Notes_API_error_number
and perform the appropriate corrective action.
请问，对应的272错误代码是什么原因造成，通过什么办法可修正？谢谢！

shu_chong_me

nml的版本和client的版本是多少