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Cannot put file: unknown data type "undefined"

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I have a personal watch face that I have developed over the last couple of years.  When I went to make a change today I get the following message when I did the build. "Internal error during build. Guru Meditation: TypeError: Cannot put file: unknown data type "undefined".  I have no idea what that means or where to look to fix the problem.  Help please!

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Found the answer: try going to package.json... you should get a prompt to upgrade to a new version. If you were using SDK 4.1, your program won't work anymore. Make sure to select 4.2 if you don't want to work exclusively on Versa 3 and Sense watches

 

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I just tried to build my app, and I got this error... was it the same one that you got?

 

Internal error during build. Guru Meditation: TypeError: Cannot put file: unknown data type "undefined"

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Found the answer: try going to package.json... you should get a prompt to upgrade to a new version. If you were using SDK 4.1, your program won't work anymore. Make sure to select 4.2 if you don't want to work exclusively on Versa 3 and Sense watches

 

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Oddly enough, I just found the same answer and I was coming back here to say "never mind".  Thanks for the assist.

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