To compile and link your application with the PCA
  Collector:

  1. Compile your sources with the "/DEBUG" qualifier;

     This puts all the necessary symbolic information PCA
     needs into the object file.

  2. The following steps specifies the PCA Collector as
     your program's "debugger":

      i  Link your program with the "/DEBUG" qualifier;

     ii  Define the logical name LIB$DEBUG as
         PCA$COLLECTOR;

  3. If PCAC$DECW$DISPLAY is defined ensure it is not set
     to " ";

  4. If PCAC$DECW$DISPLAY is undefined ensure
     PCA$DECW$DISPLAY is not set to " ";

  5. Define a valid display device:

     a.  Either:

          i Use the "SET DISPLAY/CREATE/NODE=node-name"
            command to define the display device;

     b.  Or:

          i Define the logical name DECW$DISPLAY as a
            valid display device;

  6. Run your program;

  7. When the Collector window appears on the screen, you
     have successfully invoked the Collector.