If I create a reference to a cluster and then place a control of that reference on a sub VI, the sub VI will list an error about the reference control, however this error is only listed if there is at least one other error in the block diagram. If you corect the other error(s), the reference control related error(s) are not listed and the VI will execute properly. How can an error be so unimportant? Isn't that what a warning is for?The error listed is under Block Diagram Errors: Front Panel Terminal 'Cluster Reference': hidden front panel control has undefined type.I have attached two VIs - Main.vi and Sub.vi that show an example of this situation. The second error is that the error cluster is not passed through the false case of the case structure. If you fix that problem by placing a wire between the input and output, the reference control error is no longer displayed and the VI can execute.[Edited to include attachments - when I previewed the post they dissapeared]Message Edited by andrewn on 01-18-2007 06:40 PM

LabVIEW

What are the exact conditions you are seeing this error in? Could you post a small VI that reproduces the behavior?

Noah | Applications Engineer | National Instruments

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