---
id: MAN-19
family: GR-MAN
level: core
profiles: [storage-api]
posture: normative-target
added: "1.0"
changed: "1.0"
source: https://flowdrop.io/spec/rules/gr-man/man-19
specification: FlowDrop Workflow Specification 1.0-draft
licence: CC BY 4.0
---

# MAN-19 — A workflow declared asynchronous cannot be launched and waited on

*GR-MAN (Part I) · level: core · profiles: storage-api · added in 1.0*

Asking to wait for a result the workflow has already said it will not deliver inline is a mistake worth catching before anything runs.

## The rule

> **Normative.** This is the rule.
>
> A launch requesting a synchronous wait against a workflow declared asynchronous is refused before any execution is created, so no run is started and nothing is left behind.

---

Rule identifiers are permanent and are never renumbered. This specification carries
no implementation status: each implementation publishes its own standing against
these rules. Licensed CC BY 4.0.