External output reference does not exist for IREF REFERENCE on Module 1,01,02 Block 1001
An IREF is used in the project that had no matching External OREF. This can arise in a conversion from WinCAD, for example, when the input reference text on an AI/I reference is the same as that on OREF that distributes its value through the module.
The significance is that only the specifications on the block are being used to make the connection.
This message shows a potential error in the system configuration, although most such errors prove to be harmless. It should be reviewed and hidden, unless it shows an issue that should be addressed.
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