[mrtg] MRTG not honouring mib file

[Babu C]

Hi List,
 As I suspect my issue is something to do with mrtg I am posting it 
here, I have upgraded the squid box to 3.1.8 and everything is working 
fine except the graph part with mrtg.

Details of system as follows
OS FreeBSD   : 8.1 
Squid	     : 3.1.8
MRTG         : mrtg-2.16.4
 
 My mrtg.cfg is as below
 
 LoadMIBs: /usr/local/etc/mrtg/squid.mib
 EnableIPv6: no
 WorkDir: /usr/local/www/apache22/data
 Options[_]: bits,growright
 
 Target[proxy-hit]: 
cacheHttpHits&cacheServerRequests:public at 127.0.0.1:3401
 MaxBytes[proxy-hit]: 100000
 Title[proxy-hit]: HTTP Hits
 Suppress[proxy-hit]: y
 LegendI[proxy-hit]: HTTP hits
 LegendO[proxy-hit]: HTTP requests
 Legend1[proxy-hit]: HTTP hits
 Legend2[proxy-hit]: HTTP requests
 YLegend[proxy-hit]: perminute
 ShortLegend[proxy-hit]: req/min
 Options[proxy-hit]: nopercent, perminute, dorelpercent, unknaszero,
 growright, pngdate
 #PNGTitle[proxy-hit]: Proxy Hits
 
 Target[proxy-srvkbinout]: 
cacheServerInKb&cacheServerOutKb:public at 127.0.0.1:3401
 MaxBytes[proxy-srvkbinout]: 76800
 Title[proxy-srvkbinout]: Cache Server Traffic In/Out
 Suppress[proxy-srvkbinout]: y
 LegendI[proxy-srvkbinout]: Traffic In
 LegendO[proxy-srvkbinout]: Traffic Out
 Legend1[proxy-srvkbinout]: Traffic In
 Legend2[proxy-srvkbinout]: Traffic Out
 YLegend[proxy-srvkbinout]: per minute
 ShortLegend[proxy-srvkbinout]: b/min
 kMG[proxy-srvkbinout]: k,M,G,T
 kilo[proxy-srvkbinout]: 1024
 Options[proxy-srvkbinout]: nopercent, perminute, unknaszero, 
growright, pngdate
 
 I have verified that squid snmp is working through the following 
command
 
 #snmpget -On -m /usr/local/etc/mrtg/squid.mib -v 2c -c public 
127.0.0.1:3401 cacheHttpHits cacheServerRequests cacheServerInKb 
cacheServerOutKb cacheUptime CacheSoftware cacheVersionId
 
 This gives me results without any errors so snmp part of squid is 
working fine I think
 Now when I run mrtg I could see the following errors in mrtg.log file
 
 010-10-04 12:37:33 -- Started mrtg with config 
'/usr/local/etc/mrtg/mrtg.cfg'
 2010-10-04 12:37:33 -- Unknown SNMP var cacheHttpHits
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheServerRequests
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheUptime
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheSoftware
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheVersionId
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Use of uninitialized value $ret[-2] in
 concatenation (.) or string at /usr/local/bin/mrtg line 2261.
 2010-10-04 12:37:33 -- Use of uninitialized value $ret[-1] in
 concatenation (.) or string at /usr/local/bin/mrtg line 2261.
 2010-10-04 12:37:33 -- Unknown SNMP var cacheServerInKb
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheServerOutKb
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheUptime
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheSoftware
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Unknown SNMP var cacheVersionId
  at /usr/local/bin/mrtg line 2242
 2010-10-04 12:37:33 -- Use of uninitialized value $ret[-2] in
 concatenation (.) or string at /usr/local/bin/mrtg line 2261.
 2010-10-04 12:37:33 -- Use of uninitialized value $ret[-1] in
 concatenation (.) or string at /usr/local/bin/mrtg line 2261.
 2010-10-04 12:37:33 -- 2010-10-04 12:37:33: ERROR:
 Target[proxy-hit][_IN_] ' $target->[0]{$mode} ' did not eval into
 defined data
 2010-10-04 12:37:33 -- 2010-10-04 12:37:33: ERROR:
 Target[proxy-hit][_OUT_] ' $target->[0]{$mode} ' did not eval into
 defined data
 2010-10-04 12:37:33 -- 2010-10-04 12:37:33: ERROR:
 Target[proxy-srvkbinout][_IN_] ' $target->[1]{$mode} ' did not eval
 into defined data
 2010-10-04 12:37:33 -- 2010-10-04 12:37:33: ERROR:
 Target[proxy-srvkbinout][_OUT_] ' $target->[1]{$mode} ' did not eval
 into defined data
 
 All I could make out from these error was mrtg not reading squid.mib 
file. Am I right?
 Now I am stuck and I suspect a broken mrtg? or  did I go wrong 
somewhere? Do kindly let me know what went wrong and how to proceed
 further.
 Thanx in advance
 Babs
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