Setting up Conversion of Xtend and UML datatypes in Galileo

I was just trying to set up a M2M transformation from a textual DSL to UML2 with the Galileo release. Obviously, a lot of paths have changed from oAW to Galileo, so this needs some work. However, I had an error, that annoyed me. In the editor, everything was fine, no errors, but when running the workflow, the transformation had errors like:

It could not cast from an Xtend String to an UML String. The solution is in adding the meta-model to the component:

Which is quite obvious when you have done it once, but if you try to set it up the first time, it can cost you quite some time. Especially, when everything looks good in the editor.

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