Hello @sparks. Thanks for getting in touch. I can help you with this question.
I think I can see the problem. You are correct that the AttributeManager in your workspace (based on the screenshot) does not have access to an attribute called Elevation. The reason is that the instructions specify to place the AttributeManager after the AttributeRenamer. In your workspace, it is placed before the AttributeRenamer.
If you open the AttributeRenamer, you'll see it renames a less readable attribute, _band{0}.value, to Elevation. So, if you move the AttributeManager after the AttributeRenamer, you should have access to this renamed attribute. Please give that a try and let me know if it works.
That did the trick. I overlooked the AttributeRenamer completely. I feel myself stupid... Thanks for your help!
That did the trick. I overlooked the AttributeRenamer completely. I feel myself stupid... Thanks for your help!
@sparks, you're welcome. An easy detail to miss. Please let me know if you have any more questions.