The SET COVERAGE command establishes the collection of test
    coverage data for all program locations specified by node
    specifications. The Collector places a breakpoint at each
    specified program location to measure test coverage. After
    you enter the GO command, the Collector determines whether
    each specified program location is reached during program
    execution. When a test coverage breakpoint is reached during
    program execution, the Collector records that program location
    in the performance data file. The Collector then removes the
    breakpoint so that the overhead of measuring coverage is not
    incurred in subsequent executions of the same program location.
    If you specify the /UNTIL:n qualifier, the Collector removes
    the breakpoint after the nth execution instead of the first
    execution.

    You must collect stack PC information if you want to use a /MAIN_
    IMAGE, /CUMULATIVE or /STACK_DEPTH qualifier with the PLOT or TAB
    command in the Analyzer.

    If you enter the SET COVERAGE command before entering a SET
    DATAFILE command, the Collector establishes a default data file.
    The default data file has the same file name as your program's
    executable image file and a file type of PCA.