How to Fix: How to write error status for command line 7-zip in variable (or, instead, in text file)

When using 7-zip in batch files to pack directories and send archives via email, users may encounter warning messages during processing. These warnings can be caused by multiple files being accessed simultaneously while the batch file is running. The issue at hand is to write an error status for these command line warnings into a variable or text file, allowing for more control over the email content.

This problem affects users who rely on 7-zip in their batch files and want to customize the email subject with warning messages. Currently, the only available variable is %ERRORLEVEL%, which does not provide the desired level of detail.

💡 Why You Are Getting This Error

• The primary cause of this issue lies in the way 7-zip handles concurrent file access. When multiple files are accessed simultaneously, 7-zip displays warning messages to alert users of potential data corruption or loss.
• An alternative reason for this issue is that 7-zip may not always provide detailed error information through its standard output.

✅ Best Solutions to Fix It

🎯 Final Words

By writing warnings to a file and parsing the last line, users can customize the email subject with detailed error information from 7-zip. This solution provides more control over the email content and addresses the issue of limited variable availability.