diff --git a/haystack/mappings/minidump.py b/haystack/mappings/minidump.py
index 7157fc3c..d2463423 100644
--- a/haystack/mappings/minidump.py
+++ b/haystack/mappings/minidump.py
@@ -1038,6 +1038,10 @@ def _init_mappings(self, construct_data):
             elif directory.StreamType == 'MemoryInfoListStream':
                 ## absent ?
                 print directory
+        ## FAST FAIL
+        if len(maps) == 0:
+            raise TypeError('This Minidump does not contain Memory64ListStream memory dump. ' +
+                            'Please use full memory dump options in the memory acquisition tool.')
         # target
         cpu = os_name = None
         if self.os_name is None or self.cpu is None: