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I ran a small test using OPAL-Cyc - RINGDEFINITION with a CCOLLIMATOR. I applied the SURFACEPHYSICS on the CCOLLIMATOR but the Monte Carlo was not performed. The beam colliding with the CCOLLIMATOR was simply lost and not scattered. This is related to the Issue #149 (closed)

Coll: SURFACEPHYSICS, TYPE="DEGRADER", ENABLERUTHERFORD=TRUE, MATERIAL="GraphiteR6710";
Quad1_BP: CCollimator, XSTART=-1000, XEND=-1000, YSTART=1800, YEND=1810, ZSTART=70, ZEND=170, WIDTH=200.0, SURFACEPHYSICS=Coll;

I tried to change TYPE with "COLLIMATOR" and "CCOLLIMATOR", but the results did not change.

Attached the input file and the output.

MonteCarlo_Cyc.inTYPE_COLLIMATOR.out

I ran on Merlin with the following settings:

1) gcc/5.4.0            3) OPAL/1.6.0           5) root/6.08.02         7) Tcl/8.6.4            9) Python/2.7.12       11) gsl/2.2.1           13) psi-python27/2.2.0
 2) openmpi/1.10.4       4) OPAL/1.6             6) openssl/1.0.2j       8) Tk/8.6.4            10) boost/1.62.0