FAQ: What does "Warning:2015 No display screen is selected for Prepare Sequence…" mean?

[SR-SUPPORT]

This error means your project is trying to draw a stimulus on the Host PC via the PREPARE_SEQEUNCE node's "Draw to EyeLink Host" property but hasn't been told which screen to use.

If the PREPARE_SEQUENCE's Draw to EyeLink Host property is set to IMAGE or PRIMITIVE, but no DISPLAY_SCREEN node has the Use for Host Display property enabled. The Draw to EyeLink Host property controls what is shown on the Host PC's gaze overlay screen. It has three modes:

• IMAGE: Transfers a single screenshot of the selected DISPLAY_SCREEN to be used as the backdrop.
  
• PRIMITIVE: Transfers a set of simple, filled boxes representing the objects on the selected DISPLAY_SCREEN.
  
• NO: Transfers nothing. Select this if you do not need to display any stimuli on the Host PC.
  

If IMAGE or PRIMATIVE are select you must enable the Draw to Host property for one DISPLAY_SCREEN within your RECORDING sequence. If you select more than one screen to be displayed on the Host PC at the same time only the last screen in the screen will be show and you will get a "Too many display screens found with Draw to Host turned on" error.

   

Important Note on Dynamic Stimuli: The Host PC can only display a static image. For dynamic stimuli like videos, only the first frame will be transferred when using the IMAGE option.

See How can I display my stimuli on the Host PC for details on transferring and / or drawing images to the Host PC Display.