Not sure if I'm missing something obvious, but I keep getting an error when I try to run the OpenBlocks project in Eclipse.

When the Minecraft Client loads, it shows the following error:

I think I have the OpenModsLib properly set up in the classpath (I used ./gradlew eclipse).

Any suggestions?
Thanks

You need to add -Dfml.coreMods.load=openmods.OpenModsCorePlugin to your VM arguments.

Worked perfectly! Thanks