Informix Error -50999: [Informix][Connectivity Class Library]Option not supported in ixSQLConnect::transact().

Reasons / Common Causes

-50999 is a Connectivity Class Library (ixSQLStmt/ixSQLConnect C++ class API) message — per the official guidance, the dialog reads "[Informix][Connectivity Class Library]Option not supported in ixSQLConnect::transact().".

1. The option passed to ixSQLConnect::transact() is not supported., per the official guidance.

Solutions / Resolution

1. [Informix][Connectivity Class Library]Option not supported in ixSQLConnect::transact()., per the official guidance.

Examples

N/A

No specific triggering SQL statement applies — this is a Connectivity Class Library runtime message rather than a database-engine error.

Diagnostic Checks

1. Confirm the exact circumstance described in the official text before taking corrective action — the dialog's own wording ("[Informix][Connectivity Class Library]Option not supported in ixSQLCon…") is usually specific enough to act on directly.
2. Confirm the ixSQLStmt/ixSQLConnect call sequence matches the order the API requires (e.g. prepare()/execDirect() before describe-style calls).

Related Errors / Related Topics

• -50998 — "[Informix][Connectivity Class Library]Operation not supported on the member function for t…" A related Connectivity Class Library message.
• -50995 — "[Informix][Connectivity Class Library]Function sequence error: The ixSQLStmt describeCol()…" A related Connectivity Class Library message.

[Informix][Connectivity Class Library]Option not supported in ixSQLConnect::transact().