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When I am trying to upload the stored bna file from my local storage to composer playground, I see below error:- "cannot read property 'getModelManager' of undefined"

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Can someone tell me why I am seeing this error?

Sahil
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    have you tried to deploy the bna (you mention) from the 'browse local' option in Playground? The screenshot suggests you're trying to create a new business network. Are you following a particular tutorial? How did you create the .bna file you mention? What version of Composer / Playground - assume this is a local playground? not enough detail – Paul O'Mahony Jul 20 '18 at 10:22
  • Yes Paul you are right, I was not creating the business network archive file which is to be used for upgrading network chaincode. – Sahil Jul 22 '18 at 18:11

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when composer playground is used to create the project, make sure that business network archive file is created which is then uploaded for install/update the existing network.

click here for document on upgrading existing network!

Sahil
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