Version 8 SR13
I was not doing anything special with Python (Py3), but when I open the file all the python nodes are missing. Any idea why this would happen? It’s a little disconcerting as this script that would be used by someone else and needs to be reliable. Luckily, I have document history in Dropbox so I could revert to an earlier version.
Rhino V.
Nope. It seems to happen when I use the rhinocommons library but I am not sure. I haven’t been able recreate the issue consistently to definitively say.
Still having this issue for scripts that have worked consistently for half a year all of a sudden the python nodes disappear.
@koramblyum @Gülsah_Durmaz Would you mind DMing me the grasshopper file? Also please check the latest 8.19 SRC to see if the error is still there
Hello Ehsan, thank you for your answering. I have noticed that the problem occurs by Lunchbox (last version). I downgraded the Lunchbox and now everything is working, thank you! 
Perfect. Thanks for letting me know
Lock location of nodes.gh (5.8 KB)
@eirannejad This is a GH file that I just tried opening with my Python node disappearing.
@Gülsah_Durmaz How did you determine that this was caused by lunchbox? Has this not been an issue since you downgraded Lunchbox?
Thanks for sending the file over. I can replicate the error and am looking into it
Update:
I looked at the file attached above and can only see 3 similar errors when opening the file. There are two Panel and one Button objects on the canvas that are failing to read.
If I look at the file structure in Grasshopper File Viewer, I do not see any scripting components in the Definition Objects list
Thank you for the update. Let me know what I can do about this.
