Hi, I've got the same problem as reported in this earlier post (.../forum/configuration/mib-explorer-does-not-show-anything-oid-not-appear/). I've recompiled the MIBs as described in the wiki and confirmed they exist. I'm running Ubuntu 16.04 and have installed NetXMMS via deb sources (ver 2.0.8-2) running tomcat8.
I also notice there is no 'default' internal DCI when I open the data collection configuration (as per video 8 on the NetXMS tutorials). If I select SNMP and the origin I get no dialog box with MIBs - however if I leave the Origin as NetXMS agent I do get a dialog box.
Any help would be appreciated