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I've just copied a loop element, which had a data wire going into it.

The internal wires (from the old external data wire) are now black, and I cannot delete them, or re-link them to a new external data wire.

They just don't seem to be selectable any more.

Can anybody give me an clues how I can do anything with them?

enter image description here

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up vote 4 down vote accepted

It looks like you have discovered a bug. You should report it using Help > Give Feedback.

For working around the problem, the only thing I know to do is to cut the blocks with the black wires and then paste them back in. This seems to get rid of the black wires.

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Thanks @David, yes, I also discovered the cut/paste of the blocks removes the black wires. Will let them know. – freefaller May 27 '14 at 7:46

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