The CM/2 Trace Function

The Communications Manager CM/2 offers a convenient Trace Function for better error analysis.

The Trace is also an important troubleshooting utility for R/2 Workstation Software problems when analyzing the flow of data between the host and the workstation.

The Line Trace is a very good method of analyzing SNA data flows between host and workstation. Below is a description of how to receive a Trace Recording.

It can then be used for error analysis (by the Hotline Service in Walldorf, for example).

  1. Start the Trace
  2. You start the SNA CM/2 Trace by opening (double-clicking) the Communications Manager CM/2 folder on the PM interface of the OS/2 operating system. When opened, a series of symbols are displayed for the various CM/2 functions. Activate the symbol "Problem Determination Aids - Trace" by double-clicking. A selection window now appears for the Trace Service.

  3. Define Trace Parameters
  4. In the field "Trace selection", set the following parameters:






    The transmission medium for the host, e.g. IBMTRNET for Token-Ring or SDLC for a dedicated/switched line



    Any value (no definition is standard here)

  5. Start/stop Trace Recording
  6. You start and stop a Trace Process with the pushbuttons.

  7. Save the Trace Recording, when created

You likewise save the Trace (when created) with a pushbutton. First, however, you have to stop the Trace. It is then possible for you to enter a file name with path description in the field "Trace filename". The Trace is then stored in this path/directory. If you only specify the file name, the standard directory for storing the file is the installation directory of the Communications Manager (directory /CMLIB).

When the Trace is saved, it can be analyzed with an editor.

You can activate trace creation before starting the Communications Manager. In this way, you can record a trace of a complete connection setup between SNA host and workstation.