Unclear how to run platform with exiting SRF file

[kevinmilner]

I have an existing SRF file that I want to use, running the platform in simulation mode.

The documentation (under Running Simulations, User-defined Simulations) states:

To run a user-defined simulation, two input files are required, a source description (src file) and a station list (stl file). For certain methods, the source description can either be in SRF format or a simple source description (the format is described in File Formats).

However I get this message when selecting an SRF as my source file:

Enter path and filename of source description: /home/kevin/bbp/bbp_data/run/event_136704_0.05s_ADJ_VEL.srf
File /home/kevin/bbp/bbp_data/run/event_136704_0.05s_ADJ_VEL.srf not found or invalid source description, please re-enter

Additionally, SRF files do not show up in the list when choosing the select a source description in /home/kevin/bbp/bbp_data/run option. This makes me think that maybe I'm supposed to create a SRC file, and somehow tell it the path to the SRF. However there is no mention of a field for specifying a SRF path in the File Format Guide section on the SRC files.