Mac App Store error: Unable to run installation

Question

Hello, i recently got 2 updates in MAS and as soon as i tried to update, i got errors for both apps. It's saying unable to run installation:
I tried to repair permissions but gettin the same error every time. What is the problem?

Answer 1

UHm. That also could be a slow internet connection (with high ping) ? The fact is that when i click on update, it seems it's starting to download since my internet bandwidth meter goes to 500 or more kb/s download and after 2 secs it shows INSTALLED and after 2 more seconds it says there was an error.
And this is that i'm getting in console:
02/07/12 21:14:45,027 storeagent: *** Assertion failure in -[SoftwareInstallOperation _startInstall], /SourceCache/Pisa/Pisa-93.7/Source/iTunes Protocol/Built Into App/SoftwareInstallOperation.m:277
02/07/12 21:14:45,027 storeagent: error Error Domain=NSURLErrorDomain Code=-1100 "Impossibile avviare l'installazione." UserInfo=0x1078e8420 {NSLocalizedDescription=Impossibile avviare l'installazione., NSUnderlyingError=0x7f89d1914c30 "Impossibile trovare l'URL richiesto su questo server."}
02/07/12 21:14:45,027 storeagent: underlyingError Error Domain=NSURLErrorDomain Code=-1100 "Impossibile trovare l'URL richiesto su questo server." UserInfo=0x7f89d191e490 {NSUnderlyingError=0x1078e9be0 "Impossibile trovare l'URL richiesto su questo server.", NSErrorFailingURLStringKey=file:///var/folders/68/9z7rdfy17cx4ps3lcrn_3wz00000g n/C/com.apple.appstore/439845554/mzm.exgoawfi.pkg/index.sproduct, NSErrorFailingURLKey=file:///var/folders/68/9z7rdfy17cx4ps3lcrn_3wz00000gn/C/co m.apple.appstore/439845554/mzm.exgoawfi.pkg/index.sproduct, NSLocalizedDescription=Impossibile trovare l'URL richiesto su questo server.}
02/07/12 21:14:45,027 storeagent: localException [PKProduct productByLoadingProductAtURL:file://localhost/var/folders/68/9z7rdfy17cx4ps3lcr n_3wz00000gn/C/com.apple.appstore/439845554/mzm.exgoawfi.pkg] failed Error Domain=NSURLErrorDomain Code=-1100 "Impossibile trovare l'URL richiesto su questo server." UserInfo=0x7f89d191e490 {NSUnderlyingError=0x1078e9be0 "Impossibile trovare l'URL richiesto su questo server.", NSErrorFailingURLStringKey=file:///var/folders/68/9z7rdfy17cx4ps3lcrn_3wz00000g n/C/com.apple.appstore/439845554/mzm.exgoawfi.pkg/index.sproduct, NSErrorFailingURLKey=file:///var/folders/68/9z7rdfy17cx4ps3lcrn_3wz00000gn/C/co m.apple.appstore/439845554/mzm.exgoawfi.pkg/index.sproduct, NSLocalizedDescription=Impossibile trovare l'URL richiesto su questo server.}