Execute an analysis that uses user subroutines.
If the Helius PFA user subroutine library (heliusU.dll or libheliusU.so) exists in the working directory, the analysis can be run as any other Helius PFA job. However, if this file exists in a different directory, Helius PFA must be pointed to where this file exists. This is done via the Helius PFA environment file and the variable USUB_LIB_DIR. See the Helius PFA Environment File section for more information on this environment file.