Infinitly looping call to get_first_data_point function

When I use snmpget or snmpgetnext to access data in my table, I get a timeout.  I put some printfs in my code and noticed that my get_first_data_point function (getFirst in my case) is infinitly being called.  I am assuming I am not setting something correctly in the function. All I do is set idx (put_index_data) to the first index of my data array (0).  Do I HAVE to set loop_context and data_context?  My data is external to the subagent; and all I need is the index for snmpset and snmpget handling.  Should I set the loop_context to the address of my static iterIdx variable below?
 

netsnmp_variable_list* PresetDataTableHandler::getFirst(
        void **my_loop_context,
        void **my_data_context,
        netsnmp_variable_list *put_index_data,
        netsnmp_iterator_info *mydata) {
        
printf("%s:%d %s\n", __FUNCTION__, __LINE__, "Entered.");

    netsnmp_variable_list *idx = put_index_data;
    
    PresetDataTableHandler::iterIdx = 0;
    
    snmp_set_var_typed_integer(
            idx,
            ASN_INTEGER,
            PresetDataTableHandler::iterIdx );

    idx = idx->next_variable;
 
printf("%s:%d %s\n", __FUNCTION__, __LINE__, "Exit.");

    return put_index_data;
}

 
Thanks,

Steve 		 	   		  
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