Comment (by Miren Radia):

There are several versions of CarpetX I’ve tried. When I first reported the issue, I was using 8a4c419ce902607673c7ca3b29dd96ac164c0633. When I rebuilt everything after you told me to try the puncturetracker branch for SpacetimeX, I ended up on 8dbd326326f525dd531e6628e8dd8b583030bbd4 (for CarpetX).

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2892/spacetimex-gpu-error-in-puncturetracker