diff --git a/setup.py b/setup.py
index a47b496..53432ca 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name="tradingfeatures",
-    version="0.7.1",
+    version="0.7.2",
     author="Onur Cetinkol",
     author_email="realiti44@gmail.com",
     description="A useful tool to download market history from popular exchanges.",
diff --git a/tradingfeatures/api_base.py b/tradingfeatures/api_base.py
index f9f5fbc..1c295cd 100644
--- a/tradingfeatures/api_base.py
+++ b/tradingfeatures/api_base.py
@@ -127,8 +127,8 @@ def get_hist(
                     df_temp = pd.DataFrame()
                     assert (
                         len(df) == 0
-                    ), "Warning: Got empty window from exchange in middle of download"
-                    print("    Warning: Got empty window from exchange at start")
+                    ), f"Warning: Got empty window from exchange in middle of download for {self.name}"
+                    print(f"    Warning: Got empty window from exchange at start for {self.name}")
             except Exception as e:
                 # raise e
                 print(e, "\nDebug: error between timestamps: ", start_batch, end_batch)
diff --git a/tradingfeatures/apis/bitmex/base.py b/tradingfeatures/apis/bitmex/base.py
index 05f2511..331db4f 100644
--- a/tradingfeatures/apis/bitmex/base.py
+++ b/tradingfeatures/apis/bitmex/base.py
@@ -33,7 +33,7 @@ def __init__(self):
         ]
 
         self.symbol_dict = {
-            "btcusd": "XBT",
+            "btcusd": "XBTUSD",
             "ethusd": "ETH",
             # 'ethbtc': 'ETHBTC',
             "ltcusd": "LTC",