FrameView is reporting PCL: N/A even though I have integrated pclstats.h

I have integrated pclstats.h into my Vulkan game application via the Reflex SDK v1.8. I have not integrated the low latency extension etc yet, I am just looking for latency results.

Using the Reflex_Validation/capturePclEtw.bat file I have recorded an ETL trace, and I can see the events are being posted as expected, including Marker 8 (PCLSTATS_PC_LATENCY_PING). All the events have the expected frame index, i.e. Markers 0, 1, 2, 3, 4 then 5 all for the same frame, then back to 0 with frame incremented. When LATENCY_PING is posted it appears 0, 8, 1, 2 … i.e. between the simulation start and end markers with the same frame index.

When I use FrameView it reports PCL: NA in the on screen display, and in the benchmarking trace, the “MsPCLatency” column is also NA.

I also tried the Reflex_Validation\ReflexTestSetup.bat. This also reported PC Latency = 0.0 which indicates it is not working.

Is there any extra steps I need to do to get this to work?