Run time error 53 - File Not Found 
Author: Steve A.
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Uploading to the Internet. Using the "only upload modified files " option. Partially uploads then File not found error 53 is displayed and X5 shuts down. If the " upload all files" option is selected then no problem.
Posted on the
Hello Steve,
Can you send us a screenshot of error?
If you use WebSite X5 Evolution 8, this error message appears at the moment which you have an outdated version of WebSite X5 Evolution 8. It is, therefore, easily solved by downloading the 8.0.16 update from section "Download".