将布尔值写入OPC UA服务器-“类型不同”错误

Question

Will demonstrate it simply. I'm just executing the following line:

client.writeValue(nodeId, client.readValue(nodeId));

This reads the value from the server and directly writes it back - No effect. However this works as intended for "Doubles" and "Strings" but when doing this with a node containing a BOOLEAN (UaExpert says it is a boolean), I get the following error/exception:

com.prosysopc.ua.StatusException: Bad_TypeMismatch (0x80740000) "The value supplied for the attribute is not of the same type as the attribute's value." StatusCode=Bad_TypeMismatch (0x80740000) "The value supplied for the attribute is not of the same type as the attribute's value."

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How can that be? Is there a bug in the Java API? Or a setting issue in the server?

Huge thanks in advance!

Answer 1

The error message is pretty obvious. I used to always have these errors they always occur if there's a type mismatch. Look in the server if the variable is boolean which is being assigned the value and check the type in your program