1 files changed, 7 insertions, 0 deletions
diff --git a/src/lib/tng_io.c b/src/lib/tng_io.c
index a8f9a02..74a5228 100644
--- a/src/lib/tng_io.c
+++ b/src/lib/tng_io.c
@@ -14964,6 +14964,13 @@ tng_function_status DECLSPECDLLEXPORT tng_util_generic_write_frequency_set
         return(stat);
     }
 
+    if(f <= 0)
+    {
+        printf("Cannot set writing frequency to %"PRId64". %s: %d\n",
+               f, __FILE__, __LINE__);
+        return(TNG_FAILURE);
+    }
+
     frame_set = &tng_data->current_trajectory_frame_set;
 
     if(!frame_set || tng_data->n_trajectory_frame_sets <= 0)