[ALPS-users] Plot file problems

An elementary question from a beginner user... I can't get the simplest plot file examples given in the ToolsHOWTO or Tutorial:ClassicalMCSimulations to work. While extracttext, extractxmgr and direct evaluation using xsltproc all work without complaining , no points are extracted e.g. from the task files produced by the one-dimensional Heisenberg simulation in Tutorial:ClassicalMCSimulations. Thus although the plots produced by extractxmgr plot.xml parm2a.task*.out.xml > result.xmgr are correctly labeled, there are no points. Any ideas? Thanks, Austen