The tested job is minimalist:

• it defines a Run parameter (named "IFW") to select a build from the job "IFW"
• it defines a "copy artifacts from another project" specified by a "build parameter", the parameter name beeing "IFW", and selectif the followinfg artifacts "**/*zip"

When manually launching the job, selecting the (succesful) last build of the IFW job, I got the following error:

FATAL: : only whitespace content allowed before start tag and not h (position: START_DOCUMENT seen h... @1:1)
com.thoughtworks.xstream.io.StreamException: : only whitespace content allowed before start tag and not h (position: START_DOCUMENT seen h... @1:1)
at com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:78)
at com.thoughtworks.xstream.io.xml.AbstractPullReader.readRealEvent(AbstractPullReader.java:154)
at com.thoughtworks.xstream.io.xml.AbstractPullReader.readEvent(AbstractPullReader.java:147)
at com.thoughtworks.xstream.io.xml.AbstractPullReader.move(AbstractPullReader.java:126)
at com.thoughtworks.xstream.io.xml.AbstractPullReader.moveDown(AbstractPullReader.java:111)
at com.thoughtworks.xstream.io.xml.XppReader.<init>(XppReader.java:48)
at com.thoughtworks.xstream.io.xml.XppDriver.createReader(XppDriver.java:44)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:856)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:848)
at hudson.plugins.copyartifact.BuildSelectorParameter.getSelectorFromXml(BuildSelectorParameter.java:81)
at hudson.plugins.copyartifact.ParameterizedBuildSelector.getBuild(ParameterizedBuildSelector.java:52)
at hudson.plugins.copyartifact.CopyArtifact.perform(CopyArtifact.java:164)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:700)
at hudson.model.Build$RunnerImpl.build(Build.java:178)
at hudson.model.Build$RunnerImpl.doRun(Build.java:139)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:470)
at hudson.model.Run.run(Run.java:1409)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:238)
Caused by: org.xmlpull.v1.XmlPullParserException: only whitespace content allowed before start tag and not h (position: START_DOCUMENT seen h... @1:1)
at org.xmlpull.mxp1.MXParser.parseProlog(MXParser.java:1519)
at org.xmlpull.mxp1.MXParser.nextImpl(MXParser.java:1395)
at org.xmlpull.mxp1.MXParser.next(MXParser.java:1093)
at com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:63)
... 20 more