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 (), 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:
For more information about using ICF traces, see the ICF documentation under the following:
For a general overview of the SAP NetWeaver AS trace files, see: