snmpwalk terminates snmpsimd process while Simulating SNMP Agents

I have recorded oids from a device, placed the rec file in one of the folders and set up the snmpsimd as snmpsimd --agent-udpv4-endpoint=127.0.0.1:1161 and I get:

...
Listening at UDP/IPv4 endpoint 127.0.0.1:1161, transport ID 1.3.6.1.6.1.1.0

when I do an snmpwalk (also tried snmpget with same results), like: snmpwalk -On -v1 -c recorded/ubnt-system localhost:1161 snmpsimd process is terminated with Traceback list of calls like:

Process terminated
Traceback (most recent call last):;
File "/usr/bin/snmpsimd", line 1281, in <module>;
transportDispatcher.runDispatcher();
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/carrier/asyncore/dispatch.py", line 50, in runDispatcher; raise PySnmpError('poll error: %s' % ';'.join(format_exception(*exc_info())));
PySnmpError: poll error: Traceback (most recent call last):;;  
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/carrier/asyncore/dispatch.py", line 46, in runDispatcher; use_poll=True, map=self.__sockMap, count=1);;  
File "/usr/lib/python2.7/asyncore.py", line 220, in loop;    
poll_fun(timeout, map);;  
File "/usr/lib/python2.7/asyncore.py", line 201, in poll2;    readwrite(obj, flags);;  
File "/usr/lib/python2.7/asyncore.py", line 123, in readwrite;    obj.handle_error();;  
File "/usr/lib/python2.7/asyncore.py", line 108, in readwrite;    obj.handle_read_event();;  
File "/usr/lib/python2.7/asyncore.py", line 449, in handle_read_event;    self.handle_read();;  
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/carrier/asyncore/dgram/base.py", line 163, in handle_read;    self._cbFun(self, transportAddress, incomingMessage);; 
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/carrier/base.py", line 70, in _cbFun;    self, transportDomain, transportAddress, incomingMessage;;  
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/entity/engine.py", line 152, in __receiveMessageCbFun;    self, transportDomain, transportAddress, wholeMsg;;  
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/proto/rfc3412.py", line 433, in receiveMessage;    PDU, maxSizeResponseScopedPDU, stateReference);;  
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/entity/rfc3413/cmdrsp.py", line 140, in processPdu;    (self.__verifyAccess, snmpEngine));;  
File "/usr/bin/snmpsimd", line 991, in handleMgmtOperation;    PDU, acInfo;;  
File "/home/ngeo/.local/lib/python2.7/site-packages/pysnmp/entity/rfc3413/cmdrsp.py", line 262, in handleMgmtOperation;    rspVarBinds = mgmtFun(varBinds, (acFun, acCtx));;  
File "/usr/bin/snmpsimd", line 429, in readNextVars;    varBinds, **self.__getCallContext(acInfo, True);;  
File "/usr/bin/snmpsimd", line 410, in __getCallContext;    pduType ) = acCtx  # this is not [yet] documented;;TypeError: 'SnmpEngine' object is not iterable;;
...

Is there something going on with my python modules or with the simulator?

[GeorgePapageorgakis]

Finally fixed. The problem was conflicting installations of venv and wrong versions. Had to uninstall everything and install only in venv. Now seems to work ok in venv. I suggest you edit the installation tutorial a bit so that it has more specific instructions. Thank you very much! Keep up the good work!

[etingof]

What snmpsim/pysnmp versions you are running?

Could you please upgrade to the latest released version and report back whether it works for you?