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Editorial Team
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Asked: 2026-06-04T07:12:17+00:00

So I donwloaded the ignition library , built with Maven and imported as a

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So I donwloaded the ignition library, built with Maven and imported as a project into eclipse.

However, all the libraries and sample code have a red exclamation mark in front of project name, and they do not compile. The “Problems” console shows that there are some problems with Build Path, and there are a lot of “Unbound classpath variable: ‘M2_REPO’…” entries.
I see they point to some jar files.

Please tell me how can I get rid of these errors and fix the projects so they compile?

enter image description here

Thanks in advance.

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1 Answer

  1. Editorial Team

    Add a classpath variable M2_REPO to your project:

    enter image description here

    It looks like your use classic way import project into workspace (File -> Import … -> General -> Existing Projects into Workspace), if I recall, this is the reason why Eclipse asking for a fixed-name classpath varlable M2_REPO.

    If the Android project is properly mavenized, you should install two Eclipse plugins (m2e & m2e-android) and import project as a maven project (File -> Import … -> Maven -> Existing Maven Projects), this does not require classpath vaiable M2_REPO.

    Hope this make sense.

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