GitHub user dmainou added a comment to the discussion: Passing parameters from 
workflow to pipeline

Been using kettle over 10 years and Hop for ~5:

If you set a parameter in a pipeline with a value and you tick the box that say 
pass parameters downstream you don't need to do anything else. Parameters flow 
downstream without issues.
Of course you need to name parameters in the sub transformation in the exact 
same way
This covers your first 3 screenshots.


Now your last 2 screenshots refer to variables.
Variables are distinct from parameters and, although I understand that kettle 
let's you cross pollinate, this is really is not a good idea and has been 
tightened in Hop.

One thing you could do is to land the variable and pass that down as a 
parameter therefore existing in both realms.
<img width="714" height="464" alt="image" 
src="https://github.com/user-attachments/assets/1bdf2bab-4439-4fd2-92f7-556d3b64915e";
 />


GitHub link: 
https://github.com/apache/hop/discussions/5991#discussioncomment-14954885

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