VI's in Library can't see block diagram

[morngoose]

I'm trying to access the block diagram for some VI's in a LLB file, but this option is not available when you go Window->Show Block Diagram

Also no possible to edit the VI properties.

Any reason for this ?

[altenbach]

The block diagram can be removed. Once this is done, the VI can no longer be edited or upgraded to a new LabVIEW version.

If you want to edit the VI, you need to request a VI containing the block diagram from the original developer.

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