Changing Parameters

 To change a parameter from its default value, add a line to the input stream. The line consists of 1) the name of the parameter in single quotes and CAPITAL LETTERS, 2) the new value to be assigned to the parameter, and 3) EITHER the element number for parameters that are arrays, or a slash (/) for those that are not. Each changed parameter is on a separate line, and the input ends (even if no parameters are to be changed) with 'STOP'/. Changed parameters are indicated with a * in the output.

Additional Information on:

  • Examples

    • I/O_Parameters

    Used to alter various output destinations and to control event dumping. See alldat.cdf for definitions and default values.

    Control_Parameters

    Control program flow and adjust physical constants. See alldat.cdf for definitions and default values.

    Geometry_Parameters

    The list is extensive, see UMC$DIR:GEOPAR.CMN or type HELP UMC GEOPAR parameter_name

    FILES

    Starting with V2.0, UMC reads the parameters from the file assigned to the logical UMC$PAR. To revert to the old scheme, simply assign SYS$INPUT to UMC$PAR