java.lang.NullPointerException: This exception has no message.

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This exception has no message.
java.lang.NullPointerException:
at com.m7.wide.project.artifact.ArtifactMgr.updateArtifact(Unknown Source)
at com.m7.wide.project.artifact.ArtifactMgr.B(Unknown Source)
at com.m7.wide.project.artifact.ArtifactMgr.access$000(Unknown Source)
at com.m7.wide.project.artifact.ArtifactMgr$3.process(Unknown Source)
at com.m7.wide.project.artifact.ArtifactMgr.processArtifactTask(Unknown Source)
at com.m7.wide.project.artifact.ArtifactMgr.endBatchModifications(Unknown Source)
at com.m7.wide.project.WebProject.B(Unknown Source)
at com.m7.wide.project.ProjectManager.endBacthModifications(Unknown Source)
at com.m7.wide.HostProjectMgr.fireBacthEndEvent(Unknown Source)
at com.m7.wide.HostProjectMgr.endBuilderEvent(Unknown Source)
at com.m7.wide.eclipse.NitroxBuilder.A(Unknown Source)
at com.m7.wide.eclipse.NitroxBuilder.build(Unknown Source)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:168)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:202)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:234)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:303)
at org.eclipse.ui.actions.BuildAction.invokeOperation(BuildAction.java:190)
at org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:133)

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