'Eclipse error occurred during Repository registry initialization

I suddenly encountered an error initializing Eclipse Kepler:

An internal error occurred during: "Repository registry initialization".
For input string: "(pilgrim's conflicted copy 2013-10-18).gen"

eclipse maven

Solution 1:^[1]

I found it!!!

Delete the directories inside:

.metadata/.plugins/org.eclipse.m2e.core/nexus/

And rebuild the maven project.

Note: this also applies to Eclipse Luna.

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Solution	Source
Solution 1	chiastic-security