diff --git a/src/main.cpp b/src/main.cpp
index 8dee9bfea..c9a798e4d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -590,6 +590,7 @@ int64_t komodo_snapshot()
     int64_t total = -1;
     if ( pblocktree != 0 )
         total = pblocktree->Snapshot();
+    else fprintf(stderr,"null pblocktree start with -addressindex=true\n");
     return(total);
 }
 
diff --git a/src/txdb.cpp b/src/txdb.cpp
index 72ff85937..d061d7792 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -402,6 +402,8 @@ int64_t CBlockTreeDB::Snapshot()
 {
     char chType; int64_t total = -1; std::string address;
     boost::scoped_ptr<leveldb::Iterator> pcursor(NewIterator());
+    pcursor->SeekToFirst();
+    fprintf(stderr,"pcursor iterate\n");
     while (pcursor->Valid())
     {
         boost::this_thread::interruption_point();