# Apparent compression header error on 0.9.7 **URL:** \ **Category:** Support\ **Created:** [December 20, 2021, 3:50pm UTC](https://kopia.discourse.group/t/apparent-compression-header-error-on-0-9-7/822 "2021-12-20T15:50:42Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![kopanla](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/kopanla/32/243_2.png) [@kopanla](https://kopia.discourse.group/u/kopanla)\ **Post date:** [December 20, 2021, 6:57pm UTC](https://kopia.discourse.group/t/apparent-compression-header-error-on-0-9-7/822/2 "2021-12-20T18:57:32Z")
This kind of bug happened already in 0.9.3 … See also > [@V0.9.3: Compression ... ERROR error rewriting contents in short packs: failed to rewrite 1 contents](https://kopia.discourse.group/t/v0-9-3-compression-error-error-rewriting-contents-in-short-packs-failed-to-rewrite-1-contents/688): > > I noticed this error message. Is this something serious, or can it be just ignored? Running full maintenance... Looking for active contents... Processed 13 contents, discovered 13... Looking for unreferenced contents... Rewriting contents from short packs... unable to rewrite content "290219b1ff207bb1bccef6fced326e52": unable to get content data and info: error decompressing: invalid compression header, expected 00001000 but got 2320426c Finished full maintenance. ERROR error rewriting conten… > [@0.9.5 content verify --\>\> unable to get content data and info: error decompressing: invalid compression header](https://kopia.discourse.group/t/0-9-5-content-verify-unable-to-get-content-data-and-info-error-decompressing-invalid-compression-header/751): > > I snapshotted a few folders (~100GB) into a filesystem repo (newly created, zstd enabled). After that I ran kopia maintenance run --full --safety=none but got the output below. kopia content verify --download-percent=100 Listing blobs... Listed 3878 blobs. Verifying all contents... Verified 1 contents, 0 errors, estimating... ERROR error content 0002dd26b934b9707fdbf30341e2f6cc is invalid: error decompressing: invalid compression header, expected 00001100 but got 00001000 ERROR error conte… Try to verify your content (100%). --- _[View the full topic](https://kopia.discourse.group/t/apparent-compression-header-error-on-0-9-7/822)._