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I am trying to do something similar

http://www.texample.net/tikz/examples/flowchart/

and am using overleaf.com for it. However when I open this code in overleaf, I get an error at compilation step

"Package tikz Error: I did not find the tikz library 'positioning -plus'. I looked for files named tikzlibrarypositioning-plus.code.tex and pgfli brarypositioning-plus.code.tex, but neither could be found in the current texmf trees.."

I am getting similar error for "node-families" as well.

I understand that an obvious solution would be to install something like texmaker on my machine and download this. However I want to continue with the online editor. So can someone suggest a way around this issue

closed as off-topic by TeXnician, Stefan Pinnow, TonioElGringo, egreg, Troy Jul 13 '17 at 17:34

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    It's a user-contributed library from github.com/Qrrbrbirlbel/pgf. Upload into your project folder. – percusse Jul 13 '17 at 13:31
  • @ percusse...thank you so much for your comment. It's fixed now. – NAASI Jul 13 '17 at 13:41
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    I'm voting to close this question as off-topic because the user missed the installation of some required libraries. – TeXnician Jul 13 '17 at 14:27

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