Today I wiped my work notebook - new Windows, new everything. I installed Notes and DDE again of course. I installed also FP7 - no, not FP8 ![Wink Wink](https://oliverbusse.notesx.net/xsp/.ibmxspres/domino/ckeditor/plugins/ibmsametimeemoticons/images/EmoticonWink.gif)
I noticed a weird behaviour though: my Domino Designer wasn't able to find even the basic Java classes. This is a screenshot of it when I tried to built a project:
![](/hp.nsf/xsp/.ibmmodres/persistence/DominoDoc-2BC2-postBody/object_error_1489164374285.png)
I little investigation brought me to check the installed JREs in the prefs of DDE:
![](/hp.nsf/xsp/.ibmmodres/persistence/DominoDoc-2BC2-postBody/Screenshot2017-03-1015_1489164408103.37.36.png)
For some reason the marked files in the next screenshot were not added to the JRE Domino Designer was using.
![](/hp.nsf/xsp/.ibmmodres/persistence/DominoDoc-2BC2-postBody/Screenshot2017-03-1015_1489164483872.37.28.png)
After adding them back to the JRE everything went fine.