Tcl error [nb_gotcmd]: can't read "nb_ctrlbots": n

[FIDe`]

Hi all,
sometimes, I get this error from some bots of my botnet, when I try to issue a netbots command:

(|Hardbot|): [Coolbot]: #FIDe# netpart #provapro
(|Hardbot|): [04:36] Tcl error [nb_gotcmd]: can't read "nb_ctrlbots": no such variable

I can solve the problem only logging to the bot and doing a .rehash .
here's my netset.tcl :

# netbots.tcl settings
set nb_flag all
set nb_key "h4x0rkey"
set nb_defctrl "*"
set nb_owner 0
set nb_ctrlbots ""
set nb_max 6
set nb_timeout 360
set nb_netupdate 2
set nb_nettcl 0
set nb_update "FIDe"
set nb_chon 1
set nb_broadcast "n"
set nb_cmdcast 1
set nb_castfilter "addhost ident .chpass .newpass .note"

Thanks to anyone

[Yourname]

Which version of netbots are you using?

[FIDe`]

netbots v4.09

[slennox]

[FIDe`]

All bots are eggdrop 1.6.13.
[02:24] (|Coolbot|): [Zero]: #gianfi# netcontrol
[02:24] (|Coolbot|): [Zero]: #gianfi# netpart #provapro
[02:24] (|Coolbot|): [02:24] Tcl error [nb_gotcmd]: can't read "nb_ctrlbots": no such variable

.. I'm hating them. when it does this, any netbots command doesn't work. I have only to .rehash to make them work.
Any time, .rehash.
.rehash.
and .rehash.
again and again.
love you all if you help me

[Yourname]

I remember this error and how I fixed it too, only I need to dig it up more. I use netbots by seasons, and hence keep forgetting stuff :/