Help please creating a custom product type in Magento 2

[Sanjay Jethva]

Hello

I am trying to add new product type in magento 2 but when i click on product type say Demo Product from the Add Product Select box than it will throw below error.

The requested component ("demo_product") is not found. Before using, you must add the implementation.

Can you please tell me what is missing?

I am using Magento 2.1.

Thanks in advance.