Required class missing

[ShagVT]

I'm getting a strange problem with STS 3.1 ... I have a project which works fine for a co-worker, but when I load it up on my machine I get the maven error below. I can build the project using Maven from the command line.

Any advice would be appreciated!

Description	Resource	Path	Location	Type
Execution default-resources of goal org.apache.maven.plugins:maven-resources-plugin:2.5:resources failed: A required class was missing while executing org.apache.maven.plugins:maven-resources-plugin:2.5:resources: org/codehaus/plexus/util/ReaderFactory
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realm =    plugin>org.apache.maven.plugins:maven-resources-plugin:2.5
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
urls[0] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/org/apache/maven/plugins/maven-resources-plugin/2.5/maven-resources-plugin-2.5.jar
urls[1] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/org/codehaus/plexus/plexus-utils/1.4.1/plexus-utils-1.4.1.jar
urls[2] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.6/maven-reporting-api-2.0.6.jar
urls[3] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.0-alpha-7/doxia-sink-api-1.0-alpha-7.jar
urls[4] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/commons-cli/commons-cli/1.0/commons-cli-1.0.jar
urls[5] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
urls[6] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/org/apache/maven/shared/maven-filtering/1.0/maven-filtering-1.0.jar
urls[7] = file:/C:/Documents%20and%20Settings/a501508/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.13/plexus-interpolation-1.13.jar
Number of foreign imports: 4
import: Entry[import org.sonatype.plexus.build.incremental from realm ClassRealm[plexus.core, parent: null]]
import: Entry[import org.codehaus.plexus.util.Scanner from realm ClassRealm[plexus.core, parent: null]]
import: Entry[import org.codehaus.plexus.util.AbstractScanner from realm ClassRealm[plexus.core, parent: null]]
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

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 (org.apache.maven.plugins:maven-resources-plugin:2.5:resources:default-resources:process-resources)	pom.xml	/LogManager	line 10	Maven Build Problem

[Andrew Eisenberg]

Just a guess, but try deleting your ~/.m2/repository directory. Could have been corrupted. m2e tends to be more susceptible to corruption than maven on the command line.