Use different versions of client and server software

If you are using previous versions of IBM MQ products, make sure that code conversion from the CCSID of your client is supported by the server.

An IBM WebSphere MQ Version 7.0, or later, client can connect to all supported versions of queue manager. If you are connecting to an earlier version queue manager, you cannot use features and structures from a later version of the product in your IBM MQ application on the client.

An IBM WebSphere MQ Version 7.0, or later, queue manager accepts connections from all supported versions of client.

See the programming languages supported in Developing applications for more information.