Informix Error -25539: Invalid connection-type.
Cause and resolution
Invalid connection-type.
The connection-type is invalid for the database server. This message appears when the database server is configured to address specific connection requests, for example for an ER or HDR connection.
Oninit® Troubleshooting Guidance
Reasons / Common Causes
-25539 fires when a connection request specifies a connection type the server isn't configured to address — per the official guidance, this appears when the server is set up to address specific connection requests, such as an ER or HDR connection.
- A connection-type value the database server isn't configured to accept, per the official guidance — the direct, only cause.
Solutions / Resolution
- Confirm the server is configured for the connection type being requested, per the official guidance — e.g. that ER or HDR support is actually enabled if that's the type being requested.
Examples
N/A
No specific triggering statement is documented beyond requesting an unconfigured connection type.
Diagnostic Checks
- Check the server's ER/HDR (or other connection-type-specific) configuration, and confirm it matches the connection type being requested.
Related Errors / Related Topics
No closely related error codes are cross-referenced for -25539 in this set yet.
A connection requested a type the server isn't configured to address — confirm the server's ER/HDR (or similar) configuration matches.