the problem of yade installation

Asked by De zhang on 2017-04-18

dear sir!
when I update the software, the warning as following:

W:The repository ' xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., E:Failed to fetch 404 Not Found, E:Some index files failed to download. They have been ignored, or old ones used instead.

what's the problem of this and how to solve it?


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English Edit question
Yade Edit question
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Manfred Hampl (m-hampl) said : #1

This PPA doer not provide software for xenial.
Remove this ppa from your list of software sources, and the messages should disappear.

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