You enable code tracing in Relational Design Center by uncommenting the trace property in the qdc.properties file. Refer to Default Properties for the location of the trace property. The default location of the trace file produced by Relational Design Center is <user home>\.MCPSQL\qdc.trc. A corresponding Provider trace file named qdc-provider.trc is saved to the same directory. If you enable tracing and also set the tracefile property to a different directory than the default, the Provider trace is saved in the same directory.