diff --git a/watpy/utils/coreh5.py b/watpy/utils/coreh5.py
index 92ee7491d9462b867cd8369b30db62232ad5aff7..771e89a80f8b90aeaf17fae9ccc8169379f32e98 100644
--- a/watpy/utils/coreh5.py
+++ b/watpy/utils/coreh5.py
@@ -45,6 +45,8 @@ class CoRe_h5(object):
         self.path  = path
         self.mdata = metadata # needed only in create/write
         self.dfile = dfile
+        if not os.path.isfile(os.path.join(path,dfile)):
+            print("No .h5 file found!")
 
     def create_dset(self, datain, path = None, dfile = None):
         """