Getting notified for negative values

Hello,
I am trying to somehow find a way of getting notified once I receive negative values in some cases.
I wanted to either stop the execution of the workflow and get an Error message in the console or having those values highlighted on the Excel output file.
So far, I couldn’t find a way of having any of those two executed.
Could someone advise?
Is this possible?

For Excel solution you can try

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And possibly the Breakpoint node for the other case?

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Hello @mucu,

don’t know what is calculation about and how long does workflow execution lasts but how about email notification? So you leave your workflow run till the end and just before writing data to Excel you send email to yourself (and other if needed) that there are negative values. You can add logic to catch row(s) of negative values and include it as information to email body.

Br,
Ivan

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