From 7677a4cbd4d70b47f9c7ac9bb575583a2e2c6136 Mon Sep 17 00:00:00 2001
From: Magnus Lundborg <lundborg.magnus@gmail.com>
Date: Tue, 19 Nov 2013 09:25:50 +0100
Subject: Fail more elegantly if there are no particles when setting stride
 length.

In that case do not reserve memory either.

diff --git a/src/lib/tng_io.c b/src/lib/tng_io.c
index 850c4ef..29cf246 100644
--- a/src/lib/tng_io.c
+++ b/src/lib/tng_io.c
@@ -15005,6 +15005,10 @@ tng_function_status DECLSPECDLLEXPORT tng_util_generic_write_interval_set
     if(particle_dependency == TNG_PARTICLE_BLOCK_DATA)
     {
         tng_num_particles_get(tng_data, &n_particles);
+        if(n_particles <= 0)
+        {
+            return(TNG_FAILURE);
+        }
 
         if(tng_particle_data_find(tng_data, block_id, &p_data)
         != TNG_SUCCESS)
@@ -15144,6 +15148,11 @@ tng_function_status DECLSPECDLLEXPORT tng_util_generic_write_interval_double_set
     {
         tng_num_particles_get(tng_data, &n_particles);
 
+        if(n_particles <= 0)
+        {
+            return(TNG_FAILURE);
+        }
+
         if(tng_particle_data_find(tng_data, block_id, &p_data)
         != TNG_SUCCESS)
         {
-- 
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