GitHub user dave-csc added a comment to the discussion: Pipeline Executor 
return no rows

Does your sub-pipeline have an input, too (i.e. starts with a **Get rows from 
result**)?

Pipeline Executor is meant to execute a pipeline for each row (or group of 
rows) in a parent pipeline, if you have no input you should probably place the 
sub-pipeline in a workflow rather than a pipeline.

Alternatively, you can still place it in a parent pipeline, but you need to 
trigger it with at least one row (the simplest way is to link a **Generate 
rows** transform before)

Hope this helps :)

GitHub link: 
https://github.com/apache/hop/discussions/5965#discussioncomment-14899505

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