# Error uncompressing SDK 7.7 .rar file **URL:** \ **Category:** Ignition\ **Created:** [September 16, 2014, 5:19pm UTC](https://forum.inductiveautomation.com/t/error-uncompressing-sdk-7-7-rar-file/9065 "2014-09-16T17:19:47Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jose.granero](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jose.granero/32/11190_2.png) [@jose.granero](https://forum.inductiveautomation.com/u/jose.granero)\ **Post date:** [September 16, 2014, 5:19pm UTC](https://forum.inductiveautomation.com/t/error-uncompressing-sdk-7-7-rar-file/9065/1 "2014-09-16T17:19:47Z")
I’ve downloaded the SDK 7.7.0 from downloads several times, however I always get a warning message saying “the file is either unknown or damaged” when trying to uncompress the .rar file. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [September 16, 2014, 5:20pm UTC](https://forum.inductiveautomation.com/t/error-uncompressing-sdk-7-7-rar-file/9065/2 "2014-09-16T17:20:36Z")
Well… for starters the download is actually a zip file, not a rar file, so that might be the first thing to look into. Second would be to make sure you don’t have some over-zealous antivirus program molesting your downloads. ---
**Author:** ![jose.granero](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jose.granero/32/11190_2.png) [@jose.granero](https://forum.inductiveautomation.com/u/jose.granero)\ **Post date:** [September 16, 2014, 5:35pm UTC](https://forum.inductiveautomation.com/t/error-uncompressing-sdk-7-7-rar-file/9065/3 "2014-09-16T17:35:16Z")
Thanks Kevin, I think it was a synchronization issue due to the proxy, but thanks for shedding light on this subject.