Would it be possible with EmEditors internal scripting or macro?

You could redirect HtmlTidy's Standard Error to a file TidyError.log.
Once the file is reloaded/changed in EmEditor - could you load the TidyError.log into the output bar?

Hello,

I am sorry, it was my mistake. There is no Output bar option for the Standard Error (nor for the Standard Output). I will consider adding the Output bar as an option for future versions. Thanks for your inputs!

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Yutaka Emura
Developer of EmEditor
http://www.emeditor.com/

I have changed it to send the standard output to a new document.
However, which option do I pick to send standard error to the output bar?
See image.

Hello JohnQSmith,

This screenshot

http://www.emeditor.com/images/emeditor10_tool_prop_e.png

replaces the current document with the new standard output, and shows the standard error as a tooltip. You can change the standard output to the new document, and then standard error as the output bar. I hope this helps.

Thanks!

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Yutaka Emura
Developer of EmEditor
http://www.emeditor.com/

Trying to configure an external tool for HTML Tidy. I have it set up to use the Output bar which allows me to create a new document with the standard output from TIDY. It also captures standard output in the Output bar. I don't need two copies of standard output (one as a new doc and one in output bar) and I don't want a new document containing standard error, I just want to browse standard error for warnings. How do I configure it to capture standard error in the output bar?