One little suggestion:

on *:JOIN:#: {
  set %.ch $chan
  CTCP $nick VERSION
}

on 1:CTCPREPLY:VERSION*:/onotice #channelname $nick is using IRC client: $1-

/onotice requires op status on the channel.
Also, you're using #channelname, which is telling the script to notice the channel #channelname.
Try your variable %.ch instead.
Easy fix:

on @*:JOIN:#: {
  set %.ch $chan
  CTCP $nick VERSION
}
on 1:CTCPREPLY:VERSION*:/onotice %.ch $nick is using IRC client: $1-

The @ sign in front of the event denotes OP status.

I dunno if you added it, but if you want to, it might help with something like this:

on *:JOIN:#HelpChan: {
 ctcp $nick VERSION
 msg #HelpChan Version Info for .: $+ $nick $+ :.
}
on ^*:CTCPREPLY:VERSION*: { msg #HelpChan $remove($1-,VERSION) $1- }

on *:OPEN:#: {
if ($active == #HelpChan) { enable #Menu.Help | halt }
else { halt }
}

#Menu.Help off
menu channel {
Help
.Ctcp ( $+ $1 $+ )
..Version:/ctcp $1 VERSION
..Ping:/ctcp $1 PING
..Time:/ctcp $1 Time
..Custom:/ctcp $1 $$?"Ctcp?"
.AutoVoice: {
 if ($group(#AutoVoice.Help) = on) { disable #AutoVoice.Help | echo -a AutoVoice Disabled. | halt {
 if ($group(#AutoVoice.Help) = off) { enable #AutoVoice.Help | echo -a AutoVoice Enabled. | halt }
if (!$grou(#AutoVoice.Help)) { echo -a Auto Voice system Does Not Exist. | halt }
 }
}
#Menu.Help end

#AutoVoice.Help off
on *:JOIN:#HelpChan: { mode $chan +v $nick }
#AutoVoice.Help end

That's just me. But I think it'd work. I'll test it to make sure it works. :]

ok so i brang 3 online
Rage_Virus = Bot with script
The_Infected = Op
PuNkTuReD = nick joining channel

i also added a few echos to see where it stops etc

when i bring PuNkTuReD into the room he sees(recieves ctcp by the bot)

[22:56] [Rage_Virus VERSION]

the bot sees

PuNkTuReD joined, now sending ctcp
recieved reply from PuNkTuReD now sending onotice
[22:56] [PuNkTuReD VERSION reply]: mIRC v6.35 Khaled Mardam-Bey

and on mine ( The Op ) sees

[22:56] -Rage_Virus:@#Help- PuNkTuReD is using IRC client: VERSION mIRC v6.35 Khaled Mardam-Bey

with this code

menu * {
  $$iif($$1,$style(0)) Get $+(,$$1,$chr(39),s) CTCP Version: CTCP $$1 VERSION
}
on *:JOIN:#: {
  if $nick == $me { echo -a I joined so i wont ctcp myself | halt }
  else { echo -a $nick joined, now sending ctcp | set %.ch $chan | CTCP $nick VERSION } 
}
on 1:CTCPREPLY:VERSION*: { echo -a recieved reply from $nick now sending onotice | onotice $($+(%,.,ch),2) $nick is using IRC client: $1- }

every time i use anything other than that one i submitted, the ctcp reply doesnt work. i am totally bogswaddled.. i did notice your if statement though was wrong > if $nick == $me { halt } should be > if ($nick == $me) {halt} maybe that was why. not sure. also.. i have a main theme engine running on my other script on the same pc and connection. would that affect it at all? the bot is plain mirc, nothing added. my main script is kickchat$ript v2.0 sat on mirc with a whole multitude of custom tweaks, snippets and add-ons on it

hmm /me is stumped

so my version didnt send the ctcp?
have you got any other on join events
that halt?

that is so bizzare lol.. i am flumoxed. the bot is a simple bare mirc 6.35 with just a simple !help command menu with !topics to display. the ctcp is the only main script on it

ok heres mine lol
I = The_Infected
Bot = Rage_Virus

the script is in the bot

when i join i see this ( BTW i am joining as an Op )

[21:19] [Rage_Virus VERSION]
[21:19] -Rage_Virus:@#Help- The_Infected is using IRC client: VERSION mIRC v6.35 Khaled Mardam-Bey

in the bots status screen i see this ( The bot is also an Op )

[21:19] -> [The_Infected] VERSION

[21:19] -> Ops #Help: The_Infected is using IRC client: VERSION mIRC v6.35 Khaled Mardam-Bey

and in the bots active channel i get

[21:19] [The_Infected VERSION reply]: mIRC v6.35 Khaled Mardam-Bey

i actually got a ctcp though from him on my own ctcp version on my script. > 12<21012:214am12> [DragonKnight VERSION reply]: mIRC32 v5.9 K.Mardam-Bey the bot did not do the ctcp. hence why i was using the code i had. this should be an interesting one for you

just popped my one back on and got this from the bot onoticed on my script > 12<21012:238am12> * Joins: KokoRyu (kokoryu@)
12<21012:238am12> -KokoRyu- CTCP VERSION REPLY: KokoRyuScript by KokoRyu on mIRC 6.35

this is on the bot itself

[10:38] -KokoRyu- CTCP VERSION REPLY: KokoRyuScript by KokoRyu on mIRC 6.35
[10:38] [KokoRyu VERSION reply]: mIRC v6.35 Khaled Mardam-Bey

i had a few probs with some nicks that did not accept ctcps
but apart from that it was fine for me

right.. had a tester come in and nought.. no /onotice from it. looking in status window.. all i got was this

-
[09:14] -> [Cheiron] VERSION

[10:14] -> [DragonKnight] VERSION

i have shunted that up on a side bot PunkTuReD to have a look at it and seehow it runs. will let you shortly.

try

change #channel_to_monitor
to your channel name

menu * {
  $$iif($$1,$style(0)) Get $+(,$$1,$chr(39),s) CTCP Version: CTCP $$1 VERSION
}
on *:JOIN:#channel_to_monitor: {
  if $nick == $me { halt }
  else { set %.ch $chan | CTCP $nick VERSION } 
}
on 1:CTCPREPLY:VERSION*: { onotice $($+(%,.,ch),2) $nick is using IRC client: $1- }

.....

/timer 0 0 cycle #helpchannel

alias cycle {
  part $1
  join $1
}

the reason i brought it here was for the site members to view over, try and comment on as opposed to keeping it in the snippet request section where it no longer belonged once the script was a worker. the variable was originally set for the onotice section

 CTCP *:VERSION:?: { onotice %.ch $1- } 

but that did not work. so we tried a few changes to no avail until we spotted the mistake and edited it to

 on 1:CTCPREPLY:VERSION*:/onotice $nick is using IRC client: $1-  

still didnt work we slotted in the #channel part

 on 1:CTCPREPLY:VERSION*:/onotice #channelname $nick is using IRC client: $1- 

and got a worker :) the left over variable was overlooked.

as for the menu idea... that sounds a good idea. how would you go about it though?

i think it was bought up on the forum post, but why do you set the variable if its not needed?
this is a handy lil snippet to have on hand tho.
maybe add a menu so even tho youve checked their version on join
you may need to check it again, so having an easy accessable menu option would be nice

no takers yet. it would have been interesting to have seen your views and comments to its use/functionality and how it could be expanded