Trace Files and Log Files
When you use ICF for communications, security-relevant data can be recorded in trace files. You must handle access to these trace files as restrictively as possible.
In transaction SICF (Edit → Traces), you can activate, deactivate, and display traces for individual services.
The following trace files can contain security-relevant data:
Work Process Traces
● dev_w<n>
ICM Trace
● dev_icm<n>
Message Server Trace
● dev_ms
Web Dispatcher Trace
● dev_wdisp

As an administrator, you can block other users’ access to ICF traces:
Locking/Unlocking Access to ICF Trace Functions
For more information about using ICF traces, see the ICF documentation under the following:
For a general overview of the SAP NW AS trace files, see: