# SharpCompress.Compressors.LZMA.DataErrorException: Data Error
**URL:** https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073
**Category:** Support
**Created:** [January 12, 2018, 5:51am UTC](https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073 "2018-01-12T05:51:05Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@iperov](https://forum.duplicati.com/u/iperov)
#### Post date: [January 12, 2018, 5:51am UTC](https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073/1 "2018-01-12T05:51:05Z")
test all archives by 7zip result NO error.
this error appear every month at various dbs, when duplicati try to upload to google drive.
so if problem with LZMA, i’ll try to change type of compression.
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### Author:  [@JonMikelV](https://forum.duplicati.com/u/JonMikelV)
#### Post date: [January 13, 2018, 5:14am UTC](https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073/2 "2018-01-13T05:14:51Z")
So this is the same error you mentioned here about a month ago?
> [@Compacting because there are 21 small volumes and the maximum is 20](https://forum.duplicati.com/t/compacting-because-there-are-21-small-volumes-and-the-maximum-is-20/1600/6):
>
> I found only this error in common log SharpCompress.Compressors.LZMA.DataErrorException: Data Error at SharpCompress.Compressors.LZMA.LzmaStream.Read(Byte[] buffer, Int32 offset, Int32 count) at Duplicati.Library.Utility.Utility.ForceStreamRead(Stream stream, Byte[] buf, Int32 count) at Duplicati.Library.Main.Volumes.BlockVolumeReader.ReadBlock(String hash, Byte[] blockbuffer) at Duplicati.Library.Main.Operation.CompactHandler.DoCompact(LocalDeleteDatabase db, Boolean hasVerifiedBac…
If you’re using 7-zip, then yes - there is a known issue with that library (I think it might be a memory leak?). If you’re open to using a different algorithm you might want to give that a try.
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### Author:  [@iperov](https://forum.duplicati.com/u/iperov)
#### Post date: [January 13, 2018, 6:02am UTC](https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073/3 "2018-01-13T06:02:29Z")
what you mean I using 7-zip ? 🤨
I using Duplicati.
Bug with Duplicati in subj. Error report from Duplicati.
I just checked db files with 7zip and no errors.
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### Author:  [@JonMikelV](https://forum.duplicati.com/u/JonMikelV)
#### Post date: [January 13, 2018, 2:11pm UTC](https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073/4 "2018-01-13T14:11:04Z")
> [@iperov](#):
>
> what you mean I using 7-zip ?
I mean if you have `--compression-module=7z` then the 7-Zip code is being used to create your archives. That code is known to have to have a memory leak:
> [@7z as a global option, but new backups are set to zip](https://forum.duplicati.com/t/7z-as-a-global-option-but-new-backups-are-set-to-zip/508/5):
>
> Unfortunately, that is how it is:
As another post in that topic states, if you are using `--compression-module=zip` (the default) but have set `--zip-compression-method=LZMA` then you shouldn’t be running into that particular issue.
> [@7z as a global option, but new backups are set to zip](https://forum.duplicati.com/t/7z-as-a-global-option-but-new-backups-are-set-to-zip/508/8):
>
> No, I refer to the LZMA2 compression, enabled with --compression-module=7z which also changes the file extension to .7z instead of .zip. You can change the --zip-compression-method=LZMA without any problems AFAIK.
Are your archive files ending in .7z (the above could be the problem) or in .zip (something else could be the problem)?
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### Author:  [@iperov](https://forum.duplicati.com/u/iperov)
#### Post date: [January 13, 2018, 3:59pm UTC](https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073/5 "2018-01-13T15:59:41Z")
`--compression-module=7z`
not used
By default zip wiith LZMA.
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### Author:  [@JonMikelV](https://forum.duplicati.com/u/JonMikelV)
#### Post date: [January 14, 2018, 2:26am UTC](https://forum.duplicati.com/t/sharpcompress-compressors-lzma-dataerrorexception-data-error/2073/6 "2018-01-14T02:26:49Z")
> [@iperov](#):
>
> By default zip wiith LZMA.
Ok, so that rules out the known 7-Zip module problem.
Unfortunately, I’m not familiar with the standard zip module - hopefully somebody else such as @kenkendk will have a suggestion.