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SCHED_E_NAMESPACE
SCHED_E_NAMESPACE means that the task XML contains an element or attribute from an unexpected XML namespace. The visible element names may look correct, but Task Scheduler evaluates their namespace URI as part of the schema identity.
Where it commonly appears
- XML templates lose the Task Scheduler default namespace during transformation or DOM manipulation.
- A prefix is rebound to a different URI, or a generic XML generator adds a namespace intended for another document format.
- Fragments copied from different task schema revisions are combined without preserving the root namespace and qualified children.
Reliable fix
Validate the final serialized XML, including its root declaration and namespaces, against the Task Scheduler schema. Microsoft’s schema uses the Task Scheduler namespace for task definitions; changing only the display prefix is not enough when the underlying URI is wrong.
Microsoft: Task Scheduler status codes · Microsoft: Task Scheduler schema and namespace
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