IBM MQ 2059 (MQRC_Q_MGR_NOT_AVAILABLE) error in .NET 9.0 console app using IBMMQClient with certificate-based SSL setup
Summary A .NET 9.0 console application using the IBM MQ .NET Client (managed code) fails to establish an SSL/TLS connection to the Queue Manager, resulting in MQRC_Q_MGR_NOT_AVAILABLE (2059). The error occurs during the SSL handshake phase despite the client certificate being installed in the Windows Certificate Store. Unmanaged client connections (using mqclient.ini and .kdb files) … Read more