Hi Tony, 

Thank you for reaching out!

The Z Open Editor is free of charge. It runs on your local (Windows, macOS, 
Linux) machine not z/OS itself.
It's not a standalone editor either. It's an extension to VS Code.

There are two prerequisites:
1. Java 8 or greater is installed
2. Microsoft VS Code is installed (code.visualstudio.com)

Next, install the editor extension from the VS Code marketplace:
marketplace.visualstudio.com/items?itemName=IBM.zopeneditor

If  the path to the Java is not found, you'll have to configure it manually. We 
have some documentation about this here 
marketplace.visualstudio.com/items?itemName=IBM.zopeneditor#configuring-java

After that, simply open any HLASM file in VS Code, and all the features 
described in the blogpost and documentation
should work.

The question that now arises is how exactly do you edit the assembler datasets 
that are hostside?
To edit hostside assembler, there's an extension, Zowe Explorer, to view and 
edit datasets.

To use Zowe Explorer, Zowe will need to be installed hostside.
See docs.zowe.org/stable for more details on both Zowe and Zowe Explorer.

I hope this makes sense.

- Daniel

----
Daniel Beall
Software Developer, IBM
E-mail: [email protected]

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