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Informix Error -25561: Invalid authentication type.

Cause and resolution

Invalid authentication type.

If this internal error recurs, note all circumstances and contact IBM Informix Technical Support.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-25561 fires when the server detects an invalid authentication-type value — per the official guidance, this is reported as an internal error.

  1. An invalid authentication-type value detected internally, per the official guidance — no further named detail.
Solutions / Resolution
  1. If this error recurs, note all circumstances and contact IBM Informix Technical Support, per the official guidance.
Examples
N/A

No specific triggering statement is documented beyond an internal authentication-type failure.

Diagnostic Checks
  1. Escalate to IBM Informix Technical Support — this is reported as an internal error.
Related Errors / Related Topics
  • -25546 — "Invalid network association control." A related internal connectivity error.
  • -25590 — "Authentication error." A related authentication failure, on an invalid user ID/password or CSM configuration mismatch rather than an internal invalid-type condition.

An invalid authentication type was detected internally — this is an internal error; contact IBM Informix Technical Support.