Trying to create new custom classification model, error 'InvalidContentSourceFormat: Invalid content source: Could not read build content.'

CURRAN Paul 10

I've been successfully able to create a custom classification and extraction model using Form Recognizer studio.

I'm now trying to create an updated classification model and all train attempts fail with error

InvalidContentSourceFormat: Invalid content source: Could not read build content.

I'm unsure as to what the problem is or where to start, I'm using studio.

Thanks in advance.

Ramr-msft 17,736 Reputation points

2023-10-30T12:51:11.4066667+00:00
Thanks for the question, The error ‘InvalidContentSourceFormat: Invalid content source: Could not read build content.’ typically indicates an issue with the content source access you are trying to use to train the model. Here are a few things you could try:

Check your SAS URL: Make sure you have generated a Shared Access Signature (SAS) when you’re in the menu of the selected storage account. If you have a container in that storage account, you’ll need to include your container name in the URL.

Check your blob storage path: If you placed the path of the blob storage, and it starts with ‘/’, it might create a folder with no name inside your specified folder, which could cause access issues. Try removing the leading ‘/’ from the path of the blob storage.

Check your permissions: Ensure that valid permissions are granted on the container.
CURRAN Paul 10 Reputation points

2023-11-01T08:05:11.3133333+00:00

@Ramr-msft Thanks for the reply, I'm using studio so everything in the project is default, I don't specify storage path I have selected from available containers on drop down menu.

The confusion for me is that I've successfully created a classification model very recently in the same project and when I want to train a more recent classification model this is where I see the error.

I also have a custom extraction model using the same container and that works fine and I can train that without any issues so I'm unsure as to why its only custom classification that's affected. Any ideas?

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Trying to create new custom classification model, error 'InvalidContentSourceFormat: Invalid content source: Could not read build content.'

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