diff --git a/dbzero/dbzero/reflection_api.py b/dbzero/dbzero/reflection_api.py
index 7179b51d..71d33dcf 100644
--- a/dbzero/dbzero/reflection_api.py
+++ b/dbzero/dbzero/reflection_api.py
@@ -169,9 +169,9 @@ def all(self, snapshot=None, as_memo_base=False):
                 return db0.find(db0.MemoBase, cls, prefix=prefix_name)
 
         if snapshot is not None:
-            return snapshot.find(cls, prefix=prefix_name)
+            return snapshot.find(cls.type(), prefix=prefix_name)
         else:
-            return db0.find(cls, prefix=prefix_name)
+            return db0.find(cls.type(), prefix=prefix_name)
     
     def get_instance_count(self):
         """Get number of instances of this Memo class."""
diff --git a/src/dbzero/core/storage/DRAM_IOStream.cpp b/src/dbzero/core/storage/DRAM_IOStream.cpp
index 5d5bd600..03f75dc4 100644
--- a/src/dbzero/core/storage/DRAM_IOStream.cpp
+++ b/src/dbzero/core/storage/DRAM_IOStream.cpp
@@ -83,8 +83,6 @@ namespace db0
     
     void DRAM_IOStream::load(ChangeLogIOStream &changelog_io)
     {
-        assert(m_access_type == AccessType::READ_WRITE);
-
         // simply exhaust the change-log stream
         // its position marks the synchronization point
         while (changelog_io.readChangeLogChunk());