Maybe my example can help you: 

https://community.intersystems.com/post/diagnosis-searching-similarities...

I wrote an article 2 years ago, maybe you can use it: 

https://community.intersystems.com/post/predictions-integrated-ml-and-iris

I've another about time series predictions, tell me if you are interested.

Do you get any error from de Ollama console? Maybe you can try directly with Mistral docker image, bypassing the Ollama image:

https://hub.docker.com/r/ai/mistral

Do you have IRIS configured in the same network that Ollama?

networks:
      - iris-llm2-network

Have you tried the notation: file:///yourfolder/yoursubfolder/yourfile.xsd?

Thank you @Brett Saviano! 

Maybe I'm missing something. This is my container:

ARG IMAGE=containers.intersystems.com/intersystems/iris-community:latest-preview

But I can't see the button.

Is it available for Docker distribution?

You can use...Embedded Python! You just need a business service EnsLib.File.PassthroughService to get the the json file and send it into a BP with a ClassMethod to get all the lines, here you can see an example:

https://www.geeksforgeeks.org/read-a-file-line-by-line-in-python/

You can save the object directly from the Embedded Python method or return a list of strings and map it into an Objectscript object.

The code was developed for ensemble in theory it should work.

Our workmate @Alberto Fuentes uploaded on open exchange an application to transform HL7v2 XML into er7 format, maybe it can help you: 

https://openexchange.intersystems.com/package/Healthcare-HL7-XML

In my opinion the problem is that your text is already in UTF8 but with wrong characters due to a wrong decode so you can't remove it with $ZCONVERT, you should define the charset of the data from the class that is receiving the JSON to decode the JSON properly.

To declare a specific charset for a REST API (I guess that you are using a class that extends %CSP.REST) you have to define the following parameter:

Parameter CHARSET = "utf-8";

In my case I was receiving UTF8 texts, you should configure it with your specific charset.

Where are you receiving that text? A business service? From an API REST? 

You can use $ZF(-100) command to execute operative system commands (here an example), with that command you can look for the process that is locking the superserver.