In embedded SQL, you attempted to submit a database request while you have another request in progress. You should either use a separate SQLCA and connection for each thread accessing the database, or use thread synchronization calls to ensure that a SQLCA is only accessed by one thread at a time.

• SQL Anywhere: SQLCA management for multithreaded or reentrant code
• SQL Anywhere: Using multiple SQLCAs
• SQL Anywhere: The SQL Communication Area (SQLCA)
• SQL Anywhere: Cancellation of changes
• UltraLite: Managing multiple connections