[SNMP4J] Table walk completed with status -4

[通子]

Hello!
 I created a agent with snmp4j-agent.I created a table in my MIB.
 The table is used to store all the process information on host.It contains 15 columns. So the data in the table is large.
 When i use the snmp4j-tool to query the table,i can't get all columns.The error information is "Table walk completed with status -4".
E:\window编程\网管资料\SNMP\SNMP4J\snmp4j_tool-1.8.1>snmp4j -v 2c -c public -p G
ET -Ot 192.168.14.155 1.3.6.1.4.1.28185.1.1.6.1
 
 But in fact,There are data in the agent.
And if i use GETBULK to each column,i can get all the data.
 
why is it?Any one can help me?
                       thanks!