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-rw-r--r--src/partialator.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/partialator.c b/src/partialator.c
index 09feebb4..569145e8 100644
--- a/src/partialator.c
+++ b/src/partialator.c
@@ -191,6 +191,12 @@ static void write_split(Crystal **crystals, int n_crystals, const char *outfile,
snprintf(tmp, 1024, "%s1", outfile);
split = merge_intensities(crystals1, n_crystals1, nthreads,
pmodel, min_measurements, push_res, 1);
+
+ if ( split == NULL ) {
+ ERROR("Not enough crystals for two way split!\n");
+ return;
+ }
+
STATUS("Writing two-way split to %s ", tmp);
write_reflist_2(tmp, split, sym);
reflist_free(split);