Article - CS350062
Error in OPC UA Client driver "Failed to connect to UA Server 'opc.tcp://[...] for browsing. The server does not recognize the QueryString specfied', Status code = 0X80830000" in PTC Kepware Products
Modified: 07-Aug-2025
Applies To
- ThingWorx Kepware Server (legacy) 8.0 to 6.18
- Kepware Server (formerly KEPServerEX) 5.21.236.0 to 6.18
- OPC Aggregator
Description
- Error in OPC UA Client driver when attempting to browse the tags: Failed to connect to UA Server 'opc.tcp://255.255.255.25:4840' for browsing. The server does not recognize the QueryString specfied', Status code = 0X80830000.
- Wireshark capture shows that the OPC connection attempt ends abruptly after server endpoints are queried and the new secure channel should be created
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