The trick_dp expects data to be organized in SIM_ prefixed directories. Actual data should be in RUN_ directories. Data Product spec files (DP_ files) must reside in a "DP_Product" directory. A sample directoy tree is shown below: trick_sims | | +---SIM_space_monkey | +---- RUN_banana | +---- RUN_tickle_self | +---- DP_Product | +- DP_tree.xml | +- DP_bubble.xml | +---SIM_dog +---- DP_Product +- DP_tree.xml +- DP_bubble.xml +---- RUN_test