diff --git a/pisa-btc/pisa/errors.py b/pisa-btc/pisa/errors.py
new file mode 100644
index 0000000..59fec70
--- /dev/null
+++ b/pisa-btc/pisa/errors.py
@@ -0,0 +1,13 @@
+# Appointment errors
+APPOINTMENT_EMPTY_FIELD = -1
+APPOINTMENT_WRONG_FIELD_TYPE = -2
+APPOINTMENT_WRONG_FIELD_SIZE = -3
+APPOINTMENT_WRONG_FIELD_FORMAT = -4
+APPOINTMENT_FIELD_TOO_SMALL = -5
+APPOINTMENT_FIELD_TOO_BIG = -6
+APPOINTMENT_WRONG_FIELD = -7
+APPOINTMENT_CIPHER_NOT_SUPPORTED = -8
+APPOINTMENT_HASH_FUNCTION_NOT_SUPPORTED = -9
+
+
+
diff --git a/pisa-btc/pisa/responder.py b/pisa-btc/pisa/responder.py
index 5cb5c1d..7a12bd5 100644
--- a/pisa-btc/pisa/responder.py
+++ b/pisa-btc/pisa/responder.py
@@ -1,7 +1,7 @@
 from queue import Queue
 from threading import Thread
 from pisa.zmq_subscriber import ZMQHandler
-from pisa.errors import *
+from pisa.rpc_errors import *
 from utils.authproxy import AuthServiceProxy, JSONRPCException
 from conf import BTC_RPC_USER, BTC_RPC_PASSWD, BTC_RPC_HOST, BTC_RPC_PORT