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I have two similar loop network to control two different objects with two matrix lists.

When I connect one math node to control the scales of both objects loop in the same time it show me the "invalid network" error.

I don't understand why. The task I ask for seem to me very ordinary.

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2 Answers 2

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Just add another a parameter to your loops and use this as your input parameter, like this:

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Generally loops and subprograms cannot use the same nodes. They are so called "closed" systems. So if you wanna reuse something, make a subprogram out of it and use it or use iterators/parameters.

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    $\begingroup$ It work perfectly with your method if I add a float in "new parameter" in the loop input node.Thank you ! $\endgroup$
    – lazare
    Commented Apr 19, 2022 at 22:13
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There should be a problems panel on the left n-menu in Animation nodes. There you can see whats causing the problem.

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