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If this error persists, find the client that is attempting to connect and re-install it with a version compatible with the server. 1.
- For ALTIBASE HDB 5.3.1 or below, the cm protocol version of the server and client must be identical for the client to connect to the server.
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- For ALTIBASE HDB 5.3.3 or above, backward compatibility for the server and client is supported.
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- The client can connect to a server of the same or newer version regardless of its cm protocol version whereas, connection fails if the client is of a newer version than the server.
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- In this context, the first three numbers of a product version are denoted as the version (the fourth and succeeding numbers which indicate the patch versions are irrelevant).
# How to check the server/client version
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