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• Data List Build Error (DL0002): Invalid port connection! Please disconnect to remove invalid port ("...").

Data List Build Error (DL0002): Invalid port connection! Please disconnect to remove invalid port ("...").

The port reporting the build error has no valid source instance, i.e., the device or program instance with the underlying port is no longer available in the project. The error occurs, for example, if a library is missing or a program instance has been removed. For existing port connections, PLCnext Engineer preserves the connections when deleting their source instance.

To resolve the error, check the source of the port reporting the error. Ensure that the source instance is available or disconnect the port.