Upgrade from 2 to 4
Accepted answer
You have to migrate from 2.0 to 3.x first. Then you can migrate to 4.0 from there.
Here's a link to instructions for the two-step process of upgrading: https://jazz.net/help-dev/clm/index.jsp?topic=%2Fcom.ibm.jazz.install.doc%2Ftopics%2Froadmap_clm_upgrade.html
Here's a link to instructions for the two-step process of upgrading: https://jazz.net/help-dev/clm/index.jsp?topic=%2Fcom.ibm.jazz.install.doc%2Ftopics%2Froadmap_clm_upgrade.html