diff --git a/ptypy/experiment/hdf5_loader.py b/ptypy/experiment/hdf5_loader.py
index dce96c2fe..60e57eda9 100644
--- a/ptypy/experiment/hdf5_loader.py
+++ b/ptypy/experiment/hdf5_loader.py
@@ -612,9 +612,11 @@ def _reorder_preview_indices(self):
         if self.p.frameorder.indices is None:
             return
         order = np.array(self.p.frameorder.indices, dtype=int)
+        print(order.max(), self.preview_indices.shape)
         if (order.max() > self.preview_indices.shape[-1]):
             log(3, "Given frameorder does not match dimensionality of data, keeping the original order")
             return
+        log(3, "Reordering indices")
         self.preview_indices = self.preview_indices.T[order].T
 
     def load_unmapped_raster_scan(self, indices):