I was trying to import a 3rd person shooter package from the asset store, but when it didn’t show any progress with the progress bar after a while, it vanished and I saw a console error message that said something like this:
“Error while importing package: Couldn’t decompress package”
Every time I try to import again (I’ve tried twice so far), It does that same dang thing.
Look at the folder that you have unity installed in and it should have folders like assets, library, your project and some other folders. Click on library and if you don’t see 7z, you may have to download it again.
When it happened to me it’d just not downloaded correctly. Here’s what to do if it’s the same problem:
Go to the asset store. At the top bar you’ll see a download icon between the house and shoping cart icons, that’s the “Toggle Download Manager” button. Hit it and it’ll get you a list of the things you’ve tried to or already downloaded. hit “Download” on your asset (or deleate it if it’s already marked as downloaded) and then when it shows a green bar with 100% on it it should let you import.
When it happened to me it’d just not downloaded correctly. Here’s what to do if it’s the same problem:
Go to the asset store. At the top bar you’ll see a download icon between the house and shoping cart icons, that’s the “Toggle Download Manager” button. Hit it and it’ll get you a list of the things you’ve tried to or already downloaded. hit “Download” on your asset (or deleate it if it’s already marked as downloaded) and then when it shows a green bar with 100% on it it should let you import.
Well I found the solution the for it for unity 5.6.0b8. It worked for me. Here is the step.
Note(you must have different version unity working for importing the same package)
Go to “C:\Program Files\Unity 5.6.0b8\Editor\Data\Tools” and look for 3 files with name 7z. (7z.dll, 7z.exe, 7z.txt).
Copy all the above listed file and make sure backup it your different folder.
Now Go to “C:\Program Files\Unity\Editor\Data\Tools” and look for 3 files with name 7z. (7z.dll, 7z.exe, 7z.txt)
Copy all above file and replace it with other files in “C:\Program Files\Unity 5.6.0b8\Editor\Data\Tools” and look for 3 files with name 7z. (7z.dll, 7z.exe, 7z.txt)."