PySNMP Error InterfaceIndexOrZero Error

Question

I am trying to get IPSLA data out of a Cisco router. While trying to use the most basic examples that I have come across online including the official documents from PySnmp. The error seems to be related to receiving negative or zero value objects from a query. I haven't been able to find ANY help on this, using their suggested fix hasn't helped.

When trying to execute a snmp query via PySnmp I am getting this error:

[billiam@nunya]$ python snmptests.py 
Traceback (most recent call last):
  File "snmptests.py", line 33, in <module>
    cmdgen.MibVariable('CISCO-RTTMON-MIB', '1.3.6.1.4.1.9.9.42.1.2.10.1.1')
  File "/usr/lib/python2.6/site-packages/pysnmp/entity/rfc3413/oneliner/cmdgen.py", line 424, in getCmd
    kwargs.get('contextName', null)
  File "/usr/lib/python2.6/site-packages/pysnmp/entity/rfc3413/oneliner/cmdgen.py", line 277, in getCmd
    self.makeReadVarBinds(varNames),
  File "/usr/lib/python2.6/site-packages/pysnmp/entity/rfc3413/oneliner/cmdgen.py", line 201, in makeReadVarBinds
    [ (x, self._null) for x in varNames ], oidOnly=True
  File "/usr/lib/python2.6/site-packages/pysnmp/entity/rfc3413/oneliner/cmdgen.py", line 209, in makeVarBinds
    varName.resolveWithMib(self.mibViewController, oidOnly=True)
  File "/usr/lib/python2.6/site-packages/pysnmp/entity/rfc3413/oneliner/mibvar.py", line 159, in resolveWithMib
    self.__modName, self.__symName
  File "/usr/lib/python2.6/site-packages/pysnmp/smi/builder.py", line 299, in importSymbols
    self.loadModules(modName, **userCtx)
  File "/usr/lib/python2.6/site-packages/pysnmp/smi/builder.py", line 259, in loadModules
    'MIB module \"%s\" load error: %s' % (modPath, traceback.format_exception(*sys.exc_info()))
pysnmp.smi.error.SmiError: MIB module "/usr/lib/python2.6/site-packages/pysnmp/smi/mibs/CISCO-RTTMON-MIB.py" load error: ['Traceback (most recent call last):\n', '  File "/usr/lib/python2.6/site-packages/pysnmp/smi/builder.py", line 255, in loadModules\n    exec(modData, g)\n', '  File "<string>", line 246, in <module>\n', '  File "/usr/lib/python2.6/site-packages/pyasn1/type/univ.py", line 107, in clone\n    return self.__class__(value, tagSet, subtypeSpec, namedValues)\n', '  File "/usr/lib/python2.6/site-packages/pyasn1/type/univ.py", line 22, in __init__\n    self, value, tagSet, subtypeSpec\n', '  File "/usr/lib/python2.6/site-packages/pyasn1/type/base.py", line 69, in __init__\n    self._verifySubtypeSpec(value)\n', '  File "/usr/lib/python2.6/site-packages/pyasn1/type/base.py", line 33, in _verifySubtypeSpec\n    raise c(\'%s at %s\' % (i, self.__class__.__name__))\n', 'ValueConstraintError: ConstraintsIntersection(ConstraintsIntersection(ConstraintsIntersection(), ValueRangeConstraint(-2147483648, 2147483647)), ValueRangeConstraint(0, 2147483647)) failed at: "ConstraintsIntersection(ConstraintsIntersection(), ValueRangeConstraint(-2147483648, 2147483647)) failed at: "ValueRangeConstraint(-2147483648, 2147483647) failed at: "140504945132592""" at InterfaceIndexOrZero\n']

snmptests.py

I have tried to use their listed "fix" for this error.

from pysnmp.proto import rfc1155, rfc1902, api
from pyasn1.codec.ber import encoder, decoder
from pysnmp.entity.rfc3413.oneliner import cmdgen
from pysnmp.smi import builder
# --- hack Counter type

def counterCloneHack(self, *args):
    if args and args[0] < 0:
        args = (0xffffffff+args[0]-1,) + args[1:]

    return self.__class__(*args)

rfc1155.Counter.clone = counterCloneHack
rfc1902.Counter32.clone = counterCloneHack

cmdGen = cmdgen.CommandGenerator()

mibBuilder = cmdGen.snmpEngine.msgAndPduDsp.mibInstrumController.mibBuilder


mibSources = mibBuilder.getMibSources() + (
    builder.DirMibSource('/usr/lib/python2.6/site-packages/pysnmp/smi/mibs'),
    )

mibBuilder.setMibSources(*mibSources)

errorIndication, errorStatus, errorIndex, varBinds = cmdGen.getCmd(
    cmdgen.CommunityData('public'),
    cmdgen.UdpTransportTarget(('10.8.25.65', 161)),
    cmdgen.MibVariable('CISCO-RTTMON-MIB', '1.3.6.1.4.1.9.9.42.1.2.10.1.1')
)

# Check for errors and print out results
if errorIndication:
    print(errorIndication)
else:
    if errorStatus:
        print('%s at %s' % (
            errorStatus.prettyPrint(),
            errorIndex and varBinds[int(errorIndex)-1] or '?'
            )
        )
    else:
        for name, val in varBinds:
            print('%s = %s' % (name.prettyPrint(), val.prettyPrint()))