This SAS KB article lists the directories in which the log files for SAS Data Management Studio and Server reside.

SAS Data Management Studio logs

• studio log for DataFlux^® Data Management Studio events
• platform log for DataFlux^® Data Management Studio engine events
• DAC log for data access events
• TKTS log for events related to Base data sets and data sent across the wire to SAS^® Federation Server

The studio log, the platform log, and the DAC log are enabled by default and are logged to the platform log file. This log file contains a name prefixed with platform_. The platform log file is saved to a user's profile area by default.

• Windows XP path for the platform_ log file: 
  drive:\Documents and Settings\[username]\ApplicationData\SAS\DMStudio\[instance]
• Windows 7 path for the platform_ log file: 
  drive:\Users\[username]\AppData\Roaming\SAS\DMStudio\[instance]

SAS^® Data Management Server logs

• <SASHome>/DataFluxDataManagementServer/2.x/dmserver/var/server_logs 

By default, a new server log subdirectory is generated for each server request.

Here is an example: 

20110804-14.26-pid5072__034C24

• 20110804 is the date
• 14.26 is the time
• pid5072 is the process ID
• 034C24 is a unique DataFlux Data Management Server request ID.