Article - CS433164
OPC DA Client driver Async Write 2.0 failed with Callback item error: "0xC0040006" in PTC Kepware Products
Modified: 17-Dec-2024
Applies To
- Kepware Server (formerly KEPServerEX) 6.0.2107.0 to 6.17
- ThingWorx Kepware Server (legacy) 8.0 to 6.17
- The issue has been observed with AVEVA OPC DA Server
Description
- OPC DA Client driver fails with warning in event log:
- Async Write 2.0 failed with Callback item error: 0xC0040006
- Warning occurs when performing asynchronous Write 2.0 operations to an OPC DA server
- Users can read tags but cannot write to the OPC DA server
- Issue is present in KEPServerEX when client attempting to write to OPC DA tags in the target server
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