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Informix Error -456

-456 Indicator value cannot fit in host variable.

This internal error indicates a problem in the communication between the database server and the library functions that call it. Check that your program is at the same software level as the database server in use. If the error recurs, note all circumstance, and contact IBM Informix Technical Support.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-456 is another internal client/server communications-protocol error, in the same family as -430--434: it signals a breakdown between the database server and the calling library functions, here specifically involving an indicator value, most commonly from a software-version mismatch.

  1. A client library compiled/linked against a different server version than the one actually being connected to.
  2. A driver or client library bug in how indicator values are encoded/decoded across the wire protocol.
Solutions / Resolution
  1. Verify the program and database server are at the same software level, per the official guidance — the primary, most actionable check.
  2. Contact IBM Informix Technical Support if the issue persists, per the official guidance, after documenting the circumstances.
  3. Check for a client driver/library update if the error recurs consistently with a specific client.
Examples
Confirming client/server software-level alignment
-- Compare the client library's compiled/linked version against
-- the actual connected server version before assuming a deeper
-- bug is involved.
Diagnostic Checks
  1. Confirm client/server software-level compatibility.
  2. Check for available client driver/library updates.
  3. Confirm whether the error is a one-off or reproducible.
Related Errors / Related Topics
  • -429 — "Indicator variables should be 2-byte integers." A related indicator-variable error, though an application-level type-declaration mistake rather than this internal communications-protocol issue.
  • -430 — "Type integer does not match size." The same underlying class of internal communications error, for integer types.

Check client/server software-level alignment first — it's the primary actionable step before escalating this internal-level error to IBM Informix Technical Support.