Pkzip Crc Error

41 Last updated: 28 Oct, 2014 Print Email to friend Views: 115200 About CRC Errors A CRC error indicates that some data in your Zip file (.zip or .zipx) is damaged. CRC stands for cyclic redundancy check. It is a calculation made from all bad crc unzip linux the data in a file to insure accuracy. When you add a file to a Zip bad crc linux file, WinZip calculates a CRC value for the file and saves the value in the Zip file. When you later extract the file from bad crc error the Zip file, WinZip calculates the CRC of the extracted file and compares it to the value stored when the file was zipped. If these two CRC values do not match, the file that was extracted does not match the original file, and WinZip will display a CRC Error message. When the data in a Zip file is damaged, it may not be possible to extract all of the files from the Zip file correctly. Damaged data can affect the entire Zip file, multiple files, or just one file. Why CRC Errors Occur There are many possible causes for data damage. Among the most common is a transfer error when downloading a Zip file from the internet. Such an error can introduce invalid data into a Zip file. Some other possible causes include exposure of media to excessive temperatures or magnetic fields, cross linked disk sectors, and mechanical problems with disk drives. What to do if a CRC Error Occurs The best solution to the problem of a damaged Zip file is to try to obtain another copy of the file. For example, use your backup copy of the file or get a new copy from the original source. If you obtained the Zip file by downloading it, then downloading it again will almost always solve the problem. A "Last Resort" for CRC Errors If you cannot download a new copy of the Zip file, obtain a replacement disk, or use a backup copy, you may still be able to recover some of your files, and even save portions of the files that are damaged in the Zip file. Here is the recommended procedure. Start WinZip and open the damaged Zip file Use the current available method for unzipping files to a particular folder In the Unzip dialog, select a target folder and click Unzip (XP users - Select the All files/folders in archive radio button and click Extract) WinZip will extract any undamaged files to the target folder. Each time WinZip encounters a damaged file, it will display a CRC Error message. Before clicking OK in the error message, open the target folder an

EXE causes PKZip CRC error Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] I solved my own problem. Here is what I discovered. When PKZip25 uses the 'normal' http://kb.winzip.com/kb/entry/41 compression ratio, it sometimes misenterprets the data in a Delphi file so, when it uncompresses the file, the file size is not what the original file size should be. By changing the compression Level http://lists.elists.org/pipermail/delphi/2000-August/010592.html to something other than 5 (normal) default, the problem disappears. Go figure ;-/ This is a very rare occurance for me. >>From: Thomas_J_Nesler/NRC at newresources.com@elists.org on 08/28/2000 09:07 AM EST >Hello: Anyone have any problems trying to compress a >Delphi created EXE? >Better yet, anyone know what to do when you get a CRC >uncompress error when extracting an Exe? Previous message: Writing on Canvas on MID form Next message: Compressing Delphi created EXE causes PKZip CRC error Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the Delphi mailing list

CRC error! The portable zip 1.1 contains many workarounds for undocumented restrictions in pkunzip. Compatibility is ensured for pkunzip 1.10 only. All previous versions (pkunzip 1.0x) have too many bugs and bad crc cannot be supported. This includes Borland unzip. So if your pkunzip reports a CRC error, check that you are not using an obsolete version. Get either pkzip 2.04g or unzip 5.12 (see question 2 pkzip crc error above for ftp sites). To generate zip files compatible with pkunzip 1.10, use zip 1.1 (see item 2 above for ftp site). Top Document: comp.compression Frequently Asked Questions (part 1/3) Previous Document: [30] My archive is corrupted! Next Document: [32] VMS zip is not compatible with pkzip! Part1 - Part2 - Part3 - Single Page [ By Archive-name | By Author | By Category | By Newsgroup ] [ Home | Latest Updates | Archive Stats | Search | Usenet References | Help ] Send corrections/additions to the FAQ Maintainer: jloup@gzip.OmitThis.org Last Update April 21 2003 @ 00:42 AM