Hello,

I am trying to create a custom vertical blueprint with large solar arrays on each side to help take away the monotony of laying tens of thousands of them by robot. Though every time I click the read button, I just get the message "0."

Here is what my blueprint looks like https://www.dropbox.com/s/ttqsivfi2xy0g50/Screenshot%202016-10-07%2010.44.27.png?dl=0

I bet that is a to big area outside FARL to work well.

You seem to have a non FARL blueprint before the FARL one in your toolbar, try removing all non FARL blueprints and it should work. Will fix that in one of the next versions.
Apart from that the blueprint will not work like you intend it to: http://imgur.com/a/zTFt6
It needs to be tileable between the maximum distance of the big poles, since everything that is not a rail in a blueprint get's placed whenever a pole is placed