Finally, I fix the problem. Arcserve was the problem. Just adding these
lines in the asconfig.ini resolve the error :

[NetWare Backup/Restore]
UseMultipleReadThreads=FALSE
performanceNonNakoma=TRUE

Jeff

> Hmm, you may have to also do an nss /poolrebuild to implement the fixes
> in that nss update. Make sure you have a tested backup first, just in

case.
> --
> Andrew C Taubman
> Novell Support Forums Volunteer SysOp
> http://support.novell.com/forums
> (Sorry, support is not provided via e-mail)
>
> Opinions expressed above are not
> necessarily those of Novell Inc.