Hello Dmitry,

depending on the software version you're running your system might be affected by a .RAR bug.

In GWAVA 6.5. Build 33 a fix for .RAR fingerprinting is present.

#GWAVA 6.5 Build 33 Change Notice
https://support.microfocus.com/kb/doc.php?id=7020112

If you want to update you can follow the steps in the KB article
# How to Update GWAVA 6
https://support.microfocus.com/kb/doc.php?id=7021037

If you already have the latest version you should open a SR, as this could be another issue and should be further evaluated by a Engineer.

Best regards,

Georg Des