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java.lang.NullPointerException at java.util.TreeMap.putAll(TreeMap.java:290) at hudson.plugins.copyartifact.CopyArtifact$EnvAction.buildEnvVars(CopyArtifact.java:359) at hudson.model.AbstractBuild.getEnvironment(AbstractBuild.java:756) at au.com.centrumsystems.hudson.plugin.buildpipeline.PipelineBuild.getBuildResultURL(PipelineBuild.java:190) at au.com.centrumsystems.hudson.plugin.buildpipeline.BuildForm.<init>(BuildForm.java:66) at au.com.centrumsystems.hudson.plugin.buildpipeline.BuildForm.<init>(BuildForm.java:82) at au.com.centrumsystems.hudson.plugin.buildpipeline.BuildPipelineView.getBuildPipelineForm(BuildPipelineView.java:214) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.commons.jexl.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:258) at org.apache.commons.jexl.parser.ASTMethod.execute(ASTMethod.java:104) at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:83) at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57) at org.apache.commons.jexl.parser.ASTReferenceExpression.value(ASTReferenceExpression.java:51) at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80) at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:72)