------------------- Command RANDOMIZe starts a new independent random number sequence. It can be omitted only in a first run, but it is compulsory if a sequence of independent runs is desired in order to calculate statistical errors. Command STOP, inserted at any point in the input file, interrupts the reading. Any further input card is ignored. It may be made to follow a PLOTGEOM command and the corresponding input, so that the Plotgeom program is executed, but no FLUKA simulation is started. Finally, command START is always needed to give the program the signal to begin the calculation. The command includes the number of primary histories to be simulated. A STOP command may follow, but it is not necessary since it is assumed to be present by default.
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