In Lab3 - task 3b I tried to run the hu.mit.bme.filecounter.sut project, but by starting up it shows up a validation error window and if I choose continue later the File Counter plugin fails with nullpointer exception.
I tried it both in Eclipse Neon and Oxygen . PDE was installed.
![Validation window](https://snag.gy/mOZnje.jpg)
![Exception in eclipse](https://snag.gy/GWVJXS.jpg)