diff --git a/src/loadFlash.cpp b/src/loadFlash.cpp
index 97aa9c0..3f42c4f 100644
--- a/src/loadFlash.cpp
+++ b/src/loadFlash.cpp
@@ -26,59 +26,66 @@ SimuData *CosmoTool::loadFlashMulti(const char *fname, int id, int loadflags)
   const double kpc2cm = 3.08568025e21;
   const double km2cm = 1.e5;
 
+  if (id != 0)
+    throw NoSuchFileException();
+
   data = new SimuData;
   if (data == 0) {
     return 0;
   }
 
   filename = fname;
-  H5File file (filename, H5F_ACC_RDONLY);
+  try {
+    H5File file (filename, H5F_ACC_RDONLY);
 
-  // simulation info
-  h5_read_flash3_header_info(&file, &time);
-  data->time    = time;
+    // simulation info
+    h5_read_flash3_header_info(&file, &time);
+    data->time    = time;
 
-  h5_read_runtime_parameters(&file, &lbox, &npart);
-  data->NumPart = npart;
-  data->BoxSize = lbox/kpc2cm;
+    h5_read_runtime_parameters(&file, &lbox, &npart);
+    data->NumPart = npart;
+    data->BoxSize = lbox/kpc2cm;
 
-  // particle data
-     for (int i = 0; i < 3; i++) {
-       data->Pos[i] = new float[data->NumPart];
-       if (data->Pos[i] == 0) {
-         delete data;
-         return 0;
-       }
-     }
-
-     for (int i = 0; i < 3; i++) {
-       data->Vel[i] = new float[data->NumPart];
-       if (data->Vel[i] == 0) {
-         delete data;
-         return 0;
-       }
-     }
- 
-     data->Id = new int[data->NumPart];
-     if (data->Id == 0) {
-       delete data;
-       return 0;
-     }
-
-  int offset = 0;
-  h5_read_flash3_particles(&file, &npart, &npart, &offset, 
-                           data->Pos[0], data->Pos[1], data->Pos[2], 
-                           data->Vel[0], data->Vel[1], data->Vel[2],
-                           data->Id); 
-
-  for (int i = 0; i < 3; i++) {
-    for (int n = 0; i < data->NumPart; i++) {
-      data->Pos[n][i] = data->Pos[n][i] / kpc2cm;
-      data->Vel[n][i] = data->Vel[n][i] / km2cm;
+    // particle data
+    for (int i = 0; i < 3; i++) {
+      data->Pos[i] = new float[data->NumPart];
+      if (data->Pos[i] == 0) {
+	delete data;
+	return 0;
+      }
     }
-  }
 
-  file.close();
+    for (int i = 0; i < 3; i++) {
+      data->Vel[i] = new float[data->NumPart];
+      if (data->Vel[i] == 0) {
+	delete data;
+	return 0;
+      }
+    }
+ 
+    data->Id = new int[data->NumPart];
+    if (data->Id == 0) {
+      delete data;
+      return 0;
+    }
+
+    int offset = 0;
+    h5_read_flash3_particles(&file, &npart, &npart, &offset, 
+			     data->Pos[0], data->Pos[1], data->Pos[2], 
+			     data->Vel[0], data->Vel[1], data->Vel[2],
+			     data->Id); 
+
+    for (int i = 0; i < 3; i++) {
+      for (int n = 0; i < data->NumPart; i++) {
+	data->Pos[n][i] = data->Pos[n][i] / kpc2cm;
+	data->Vel[n][i] = data->Vel[n][i] / km2cm;
+      }
+    }
+
+    file.close();
+  } catch (const FileIException& e) {
+    throw NoSuchFileException();
+  }
 
   return data;
 }