I don't get data to my subworkflow

@Andras_Turnai make sure your sub flow is published, type anything in the query field, and once the sub flow will run in background wait until it finishes and there see the logs and there you will get the variables AI agent sends and how, and from there you can actually copy those and move ahead building your sub flow with that value so that whenever the main flow calls the sub flow the value passes down smoothly between further nodes.