I'm trying to do a simple SNMP get on a single OID following the example here:

http://www.webnms.com/snmp/help/snmpapi/snmpv2c/index.html

My code is identical to the tutorial with the addition of session.setCommunity("xxx"). I can see the SNMP request being built and the correct data being returned with a network analyser (Wireshark) when I execute the example.

When I launch the program, I get a timeout as per below:

 AdventNet SNMP API 4 SP5 ( Release 4.0.5 )
Sent Type: GET. RequestID: 1 to "127.0.0.1:161".
Sent Time: Thu Aug 20 14:21:29:017 BST 2009
Length of SNMP DATA: 43
DATA

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00

Timed out. No more retries to "127.0.0.1:161". RequestID: 1
Time: Thu Aug 20 14:21:34:020 BST 2009
Exception in thread "main" java.lang.NullPointerException
 at com.xxx.xxx.xxx.snmpget.main(snmpget.java:23)

I've intentionally hidden IP addresses, and masked the DATA contents.

An equivalent snmpget from the command line works as intended.

Any idea's where I can start debugging?

Kind regards,

Gareth