errors / soap-web-services / validation-error-required-element-missing
Validation Error — Required Element Missing in Request
The error SOAP-ENV:Client.validationError — Validation error occurred. Required element 'Position_ID' is missing from the request
What it means
The request XML is missing an element that the web service version you're calling treats as mandatory. This often appears after a WWS version upgrade: an element that used to be optional became required, or the request was built against a different version's schema.
Troubleshooting
- Note the WWS version in your request (the
versionattribute or endpoint URL) and pull that exact version's XSD/documentation. - Compare your payload against the schema — required elements differ between versions.
- If the integration recently changed WWS versions, diff the old and new schemas for the operation.
- Check conditional requirements: some elements are only required when a sibling element is present.
⚡ Quick fix
Add the missing element with a valid value to the request and re-run.
✓ Permanent fix
Pin and document the WWS version per integration, validate outbound payloads against the versioned schema in your build or middleware, and treat WWS version upgrades as a tested change with schema diff review.