Frequently Asked Question

"Invoke failed:" Errors
Last Updated 3 years ago

An "Invoke failed: xxx" error message in the Unity console usually indicates a network-related issue. Please, verify the following:

  • The AcqKnowledge is running and the NDT functionality is active and working (described in detail in this article).
  • The polling/limitting frequency for the channels in Unity is not set too high. The XML/RPC api the AcqKnowledge NDT functionality uses is not designed for high data volumes (streaming) because of its high overhead. When AcqKnowledge is busy processing data it will not respond to the Unity requests in time, resulting in timeouts and the error messages. If that happens the polling frequency needs to be reduced and the application restarted.

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