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-rw-r--r--libcrystfel/src/image-hdf5.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libcrystfel/src/image-hdf5.c b/libcrystfel/src/image-hdf5.c
index 30bb1939..d60d4d47 100644
--- a/libcrystfel/src/image-hdf5.c
+++ b/libcrystfel/src/image-hdf5.c
@@ -1498,6 +1498,8 @@ char **image_hdf5_expand_frames(const DataTemplate *dtempl,
int dims_expected;
struct ev_list full_evs;
+ if ( dtempl->n_panels == 0 ) return NULL;
+
full_evs.events = NULL;
full_evs.n_events = 0;
full_evs.max_events = 0;