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"Error reading header after processing 0 entries" when using WinZIP extract IBM Cognos download

Technote (troubleshooting)


Customer navigates to Customer downloads software (for example 'C8_Cont_8_4_Win32_FP001.tar.tar'. Customer tries to extract file using WinZIP, but receives an error message.



Error reading header after processing 0 entries.


Third party software (WinZIP) does not handle filenames which end in ".TAR.TAR" correctly.

Resolving the problem


  1. Rename the ".TAR.TAR" file to ".TAR.GZ". For example, rename "C8_Cont_8_4_Win32_FP001.tar.tar" to "C8_Cont_8_4_Win32_FP001.tar.gz"
  2. Extract this .TAR.GZ file with WinZip.


Use alternative compression software to extract the ".TAR.TAR" file.

TIP: There are several compatible software products available. IBM do not specifically recommend any one product, although one popular freeware product (used by many customers) is '7-Zip'.

Related information

7-Zip download page

Cross reference information
Segment Product Component Platform Version Edition
Business Analytics Cognos 8 Business Intelligence Install and Config Windows 8.4, 8.4.1 All Editions

Document information

More support for: Cognos Controller

Software version: 8.1, 8.2, 8.3, 8.4

Operating system(s): Windows

Software edition: Not Applicable

Reference #: 1403948

Modified date: 21 September 2009

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