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Known Issue: Container Image Image Tool (imgtrack) fails with error: "gzip: stdin: not in gzip format" (IOK-929813)

Known Issue: Container Image Image Tool (imgtrack) fails with error: "gzip: stdin: not in gzip format" (IOK-929813)


The Container Image Inventory Tool imgtrack that is shipped with FlexNet Manager Suite 2022 R1 fails when it is executed. Output from the tool shows error details like the following:

imgtrack: checking ndtrack support for linuxx86_64
gzip: stdin: not in gzip format
tar: Child died with signal 13
tar: Error is not recoverable: exiting now
imgtrack: ERROR: no ndtrack supporting linuxx86_64


The imgtrack file contains a shell script with some embedded binary content. It can be modified using a command such as the following to stop this issue from occurring:

sed -i -e 's/tail +/tail -n +/g' -e 's/NR + 1/NR + 2/g' imgtrack

Additional information

See the following page for further information about imgtrack: Container Image Inventory Tool imgtrack.

Fix status

This issue has been fixed in the following FlexNet Manager Suite release: 2022 R1.4 / Aug 2022 (Cloud)

This issue is planned to be addressed in the following future FlexNet Manager Suite release: 2022 R2 (On Premises)

Other information

Affected components: Agent, Containers, Inventory

Master issue ID: IOK-929813

Also known as: FNML-76746

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Version history
Last update:
‎Sep 13, 2022 02:36 AM
Updated by: