Saving then importing a model gives an error

[mysticaltech]

When saving a model with .toJSON, and later importing it, it generates the following error:

TypeError: Cannot read property 'length' of undefined

I triple checked multiple times, this error is very real.

[serendipious]

Sorry for the delayed response @mysticaltech, and thanks for filing this bug. This might be related to the other bug (#21) you had filed, that is now fixed in the latest release (>= 0.3.4) as I'm unable to reproduce it at least for sample datasets. Would you mind re-testing and see if you are still encountering the issue? Feel free to re-open the issue if you continue to see the bug. Thanks again!