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The lcsim package currently depends on Java 1.6 whereas the current release is 1.7 so incompatibilities may occur. These will show up as error messages in your job log like the following.

2013-04-25 23:56:05 UTC dirac-jobexec/LCSIMAnalysis
ERROR: java version "1.6.0_33"Java(TM) 
SE Runtime Environment (build 1.6.0_33-b04)Java HotSpot(TM) 64-Bit Server VM (build 20.8-b03, mixed mode) 
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/lcsim/analysis/SimpleTrackAnalysis : 
Unsupported major.minor version 51.0

This means that the jar with the external classes, in this case lcsim-analysis, was compiled with Java 1.7 but the JVM on the grid node is 1.6. This problem can be solved by using a 1.6 compiler locally or specifying 1.6 as the target in the Maven POM file.

dirac-repo-retrieve-jobs-output-data -r ../repositoryFiles/sidloi3.JM_test_analysis_prodID_1946.prod1946.cfg