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OData $metadata

OData metadata failed to load

Client, Fiori app or API tooling cannot load the service $metadata document.

Quick answer

Most likely cause
Service registration or system alias is broken.
Check first
Open the service $metadata URL directly.
First resolution step
Fix registration, alias, backend exception or authorization first.

Likely root causes

  1. Service registration or system alias is broken.
  2. Backend model provider raises an exception.
  3. Authorization, connectivity or metadata-cache inconsistency prevents metadata generation.

What to inspect

  1. Open the service $metadata URL directly.
  2. /IWFND/ERROR_LOG and backend ST22 for the same timestamp.
  3. /IWFND/MAINT_SERVICE system alias and service status.
  4. Gateway metadata cache only after root cause is understood.

Resolution path

  1. Fix registration, alias, backend exception or authorization first.
  2. Invalidate/refresh metadata cache only when a stale-cache condition is actually suspected.
  3. Verify $metadata returns valid XML before retesting the app.
  4. Check that client and backend service versions match.

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