PrintTransmitter error and trace logging can be enabled from the Strategy Diagnostics and Performance Logging tool under Machine Default in Strategy 9.x as shown below. The Diagnostics and Performance Logging tool can be accessed on the Intelligence Server machine in:

NOTE: The PrintTransmitter component is not available if "CastorServer Instance" is picked under "Select Configuration".
By default, the log files are created in the "Program Files\Common Files\MicroStrategy\Log" folder in Windows, and in the "/<Log Path specified at Installation>/IntelligenceServer" folder in Unix/Linux.