This can be a real problem if you have a lot at stake. The 7-zip data error as described by definition is the error when you are unable to recover the data. Below mentioned are detailed insight regarding the definition, causes, and potential solutions for fixing 7-zip data error. This may occur due to any virus, downloading issues, or corruption in the properties of the file. What I can do to fix the 7-zip data error?ħ-zip data error is something that impedes the data recovery.