Fail to compile

[craff]

I have a file that do not compile:

$ snap2js Ballons2.xml 
Cannot read property 'children' of null

The file is there

[brollb]

Thanks for reaching out. I suspect something changed in the serialization format in the latest version of Snap... That said, we have actually been migrating to netsblox-vm.

Can you give that a try and/or share the project file here (zipped)? The link appears to be broken.