net-snmp help required

Subject: Need net-snmp help! Can't properly unload a shared object
(dlmodNextIndex not
decrementing)

This question refers to the Net-SNMP online tutorial entitled, "Writing
a Dynamically Loadable Object":

http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Dynamically_Loadable_Object<http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Dynamically_Loadabl>

I've succesfully carried out the steps listed under "Steps to test the
shared object via runtime MIB configuration".

However, I'm trying to go one step further in this tutorial and unload
the shared object, and delete it from the "dlmodTable".
I can do both of these things, however, "dlmodNextIndex", which is
documented as being "the index number of next appropiate unassigned
entry in the dlmodTable", remains unchanged. I would have thought it
should decrement. Can anyone please shed some light on this matter?

This is what I do:

1) Check "dlmodNextIndex" (should be the next available index into
"dlmodTable"):

% snmpget localhost UCD-DLMOD-MIB::dlmodNextIndex.
0
dlmodNextIndex.0 = 2

2) Unload the shared object:

% snmpset localhost UCD-DLMOD-MIB::dlmodStatus.1 i unload
dlmodStatus.1 = unload(5)

3) Check that it has been unloaded:

% snmptable localhost UCD-DLMOD-MIB::dlmodTable
SNMP table: dlmodTable
dlmodName dlmodPath dlmodError dlmodStatus
nstAgentPluginObject /path/to/nstAgentPluginObject.so unloaded

4) Delete it:

% snmpset localhost UCD-DLMOD-MIB::dlmodStatus.1 i delete
dlmodStatus.1 = delete(7)

5) Check that it has been deleted:

% snmptable localhost UCD-DLMOD-MIB::dlmodTable
SNMP table: dlmodTable
no entries

6) Check "dlmodNextIndex" (Should have decremented? But it doesn't!)

% snmpget localhost UCD-DLMOD-MIB::dlmodNextIndex.0
dlmodNextIndex.0 = 2

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