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I think I worked it out, the msg.points array doesn't have a size allocated before assigning values to it. I had to put msg.points.resize(num_points) to assign it the correct size before allocation.

Thanks for looking! Dan

I think I worked it out, the msg.points array doesn't have a size allocated before assigning values to it. I had to put msg.points.resize(num_points) to assign it the correct size before ~~allocation.~~assignment.

Thanks for looking! Dan

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