Hai ragione, scusa, per la fretta ho omesso dettagli importanti.

IDE:
IBM Rational® Software Architect™ for WebSphere® Software

Version: 7.5.5.5
Build ID: RSA4WSO7555-I20111025_1020

Tentativo di installare il plugin Maven Integration for Eclipse, fallito per il seguente motivo, dopo aver utilizzato il repository https://repository.sonatype.org/cont...2.0/N/LATEST/:

codice:
Cannot complete the request.  See the details.
Unsatisfied dependency: [org.eclipse.m2e.feature.feature.group 1.2.0.20120719-1404] requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.platform.feature.group/3.6.0
Unsatisfied dependency: [org.eclipse.m2e.feature.feature.group 1.2.0.20120719-1404] requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.jdt.feature.group/3.6.0
Unsatisfied dependency: [org.eclipse.m2e.feature.feature.group 1.2.0.20120719-1404] requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.rcp.feature.group/3.6.0
Unsatisfied dependency: [org.eclipse.m2e.discovery 1.2.0.20120719-1404] requiredCapability: osgi.bundle/org.eclipse.equinox.p2.ui.discovery/0.0.0
Unsatisfied dependency: [org.eclipse.m2e.discovery 1.2.0.20120719-1404] requiredCapability: osgi.bundle/org.eclipse.equinox.p2.discovery/0.0.0
Unsatisfied dependency: [org.eclipse.m2e.discovery 1.2.0.20120719-1404] requiredCapability: osgi.bundle/org.eclipse.equinox.p2.operations/0.0.0
Unsatisfied dependency: [org.eclipse.m2e.launching 1.2.0.20120719-1404] requiredCapability: osgi.bundle/com.ibm.icu/4.0.1
Unsatisfied dependency: [org.eclipse.m2e.core.ui 1.2.0.20120719-1404] requiredCapability: osgi.bundle/com.ibm.icu/4.0.1
Unsatisfied dependency: [org.eclipse.m2e.model.edit 1.2.0.20120719-1404] requiredCapability: osgi.bundle/com.ibm.icu/4.0.1
Cannot find a solution where both "bundle com.ibm.icu [3.8.1.1,4.0.0)" and "bundle com.ibm.icu 4.0.1" are satisfied.
Ho riportato solo la prima parte degli errori che sputa fuori. Altrimenti sarebbe un log chilometrico, ma dovrebbe bastare.