diff --git a/src/currency_core/blockchain_storage.cpp b/src/currency_core/blockchain_storage.cpp
index 54813472..3335c94c 100644
--- a/src/currency_core/blockchain_storage.cpp
+++ b/src/currency_core/blockchain_storage.cpp
@@ -578,13 +578,13 @@ bool blockchain_storage::set_checkpoints(checkpoints&& chk_pts)
   catch (const std::exception& ex)
   {
     m_db.abort_transaction();
-    LOG_ERROR("UNKNOWN EXCEPTION WHILE ADDINIG NEW BLOCK: " << ex.what());
+    LOG_ERROR("UNKNOWN EXCEPTION WHILE SETTING CHECKPOINTS: " << ex.what());
     return false;
   }
   catch (...)
   {
     m_db.abort_transaction();
-    LOG_ERROR("UNKNOWN EXCEPTION WHILE ADDINIG NEW BLOCK.");
+    LOG_ERROR("UNKNOWN EXCEPTION WHILE SETTING CHECKPOINTS.");
     return false;
   }
   
@@ -1036,7 +1036,9 @@ void blockchain_storage::purge_alt_block_txs_hashs(const block& b)
 //------------------------------------------------------------------
 void blockchain_storage::do_erase_altblock(alt_chain_container::iterator it)
 {
-  purge_altblock_keyimages_from_big_heap(it->second.bl, get_block_hash(it->second.bl));
+  crypto::hash id = get_block_hash(it->second.bl);
+  LOG_PRINT_L1("erasing alt block " << print16(id) << " @ " << get_block_height(it->second.bl));
+  purge_altblock_keyimages_from_big_heap(it->second.bl, id);
   purge_alt_block_txs_hashs(it->second.bl);
   m_alternative_chains.erase(it);
 }
diff --git a/src/currency_core/blockchain_storage.h b/src/currency_core/blockchain_storage.h
index 7cb02c41..cad2ca91 100644
--- a/src/currency_core/blockchain_storage.h
+++ b/src/currency_core/blockchain_storage.h
@@ -396,7 +396,7 @@ namespace currency
         else
         {
           CHECK_AND_ASSERT_MES(*block_ind_ptr < m_db_blocks.size(), false, "Internal error: bl_id=" << string_tools::pod_to_hex(bl_id)
-            << " have index record with offset=" << *block_ind_ptr << ", bigger then m_blocks.size()=" << m_db_blocks.size());
+            << " have index record with offset=" << *block_ind_ptr << ", bigger then m_db_blocks.size()=" << m_db_blocks.size());
           blocks.push_back(m_db_blocks[*block_ind_ptr]->bl);
         }
       }