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-rw-r--r--libcrystfel/src/image-msgpack.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/libcrystfel/src/image-msgpack.c b/libcrystfel/src/image-msgpack.c
index 827b7724..38bafb0a 100644
--- a/libcrystfel/src/image-msgpack.c
+++ b/libcrystfel/src/image-msgpack.c
@@ -150,6 +150,11 @@ ImageFeatureList *image_msgpack_read_peaks(const DataTemplate *dtempl,
return NULL;
}
+ if ( dtempl->peak_list == NULL ) {
+ ERROR("You must set 'peak_list' in the geometry file.\n");
+ return NULL;
+ }
+
msgpack_unpacked_init(&unpacked);
r = msgpack_unpack_next(&unpacked, data_block, data_block_size, NULL);
if ( r != MSGPACK_UNPACK_SUCCESS ) {