Error popping up while installing beta version of UDKInstall-2012-02

Asked By 10 points N/A Posted on -

Hello all,

I am trying to install the beta version of UDKInstall-2012-02, but the following error keeps popping up.

Installation Failed

Extracting all files failed with the exception:

Ionic.Zlib.ZlibException: Bad state (invalid stored block lengths)

at Ionic.Zlib.InflateManager.Inflate(Flush Type flush)

at Ionic.Zlib.ZlibCodec.Inflate(Flush Type flush)

at Ionic.Zlib.ZlibBaseStream.Read(Byte[] buffer, Int32 offset, Int32


at Ionic.Zlib.DeflateStream.Read(Byte[] buffer, Int32 offset, Int32


at Ionic.Crc.CrcCalculatorStream.Read(Byte[] buffer, Int32 offset, Int32


at Ionic.Zip.ZipEntry.ExtractOne(Stream output)

at Ionic.Zip.ZipEntry.InternalExtract(String baseDir, Stream outstream,

String password)

at Ionic.Zip.ZipFile._InternalExtractAll(String path, Boolean


at UnSetup.Utilis.UnzipAllFiles(ZipFile Zip, String Destination)

Please visit http:\udk.comtroubleshooting for assistance.


The program is downloaded using IDM and has been checked using md5. I am using Administrator on windows 7 and the antivirus is disabled.

Any advice will be appreciated.


Answered By 10 points N/A #153723

Error popping up while installing beta version of UDKInstall-2012-02


Hello Mikee,

I highly suspect that the program you downloaded is having some problems. Either it has broken files it is not a genuine file. To solve the issue you will therefore need to do the following:

  • Download the file afresh. Make sure that you have strong internet connection so that some pieces of the file will not be broken. Do not use any illegal tools to download.
  • Try downloading the file from a different site. It is better if you ensure that the site you are downloading from is a trusted site.
  • You should also try getting a full version of the same and see if it will install without a problem.




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