If you have communication problems, you can capture an SDLC trace. Complete the following steps to capture a trace.
You must be a member of the local Administrators
group to operate the RJE Configuration Utility. If you are assigned the
Configure - RJE user
access right on the computer to which you are trying to connect, but
are not a member of the Administrators
group, the RJE Configuration Utility will operate in read-only mode.
Open the RJE Configuration Utility.
Select the Communication
Link tab. 
Under Link options, select an SDLC link and click Modify.
The BARR/SNA SDLC Link Service utility displays.
From the Trace tab, select Trace enabled.
In the Trace format drop-down list, select Long or Short.
In the Max trace file size text box, type the maximum trace file size.
Recreate the problem or software event.
Clear the Trace enabled check box to stop the trace. The trace results are saved to a text file. By default, the file will be saved in the \\Program Files\Common Files\Barr\Trace folder. When you capture diagnostics with the Diagnostics Utility, this file will be automatically included.
Click OK.
