how to i create custom node?

hi everybody

I try to create knime custom node. I saw guide for node creation this url (


there are some source code for custom node. I downloaded KNIME SDK 2.12.2.

I copy and paste source code. but I have error. I attach error screenshot.

what is the problem? When I click change workspace/project compilance and JRE to 1.5, other error

is occured. hierarchy of type xxxx inconsistent.

how do i solve this problem?


ps. let me know tutorial for custom node creation.

You can find the KNIME developer guide here: 

KNIME 2.12 uses Java 1.7

oh...thanks I solved the error. I install KNIME SDK 3.0.1.