Comment (by Roland Haas):

I think it would be best if this was changed. Eg the STORAGE: Scalar code earlier in schedule.ccl is not case sensitive, so it would seem strange if READ/WRITE were case sensitive but STORAGE (and likely SYNC) was not. My guess would be that case sensitive parts are usually the schedule items (and the C code embedded in schedule.ccl), which required for C routines since the language itself requires this and apparently inherited by the user defined group.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2344/presync-fails-to-parse-wavetoyopencls