MQL5 ReferencePython Integrationlast_error

last_error

Return data on the last error.

last_error()

Return Value

Return the last error code and description as a tuple.

Note

last_error() allows obtaining an error code in case of a failed execution of a MetaTrader 5 library function. It is similar to GetLastError(). However, it applies its own error codes. Possible values:

Constant	Value	Description
RES_S_OK	1	generic success
RES_E_FAIL	-1	generic fail
RES_E_INVALID_PARAMS	-2	invalid arguments/parameters
RES_E_NO_MEMORY	-3	no memory condition
RES_E_NOT_FOUND	-4	no history
RES_E_INVALID_VERSION	-5	invalid version
RES_E_AUTH_FAILED	-6	authorization failed
RES_E_UNSUPPORTED	-7	unsupported method
RES_E_AUTO_TRADING_DISABLED	-8	auto-trading disabled
RES_E_INTERNAL_FAIL	-10000	internal IPC general error
RES_E_INTERNAL_FAIL_SEND	-10001	internal IPC send failed
RES_E_INTERNAL_FAIL_RECEIVE	-10002	internal IPC recv failed
RES_E_INTERNAL_FAIL_INIT	-10003	internal IPC initialization fail
RES_E_INTERNAL_FAIL_CONNECT	-10003	internal IPC no ipc
RES_E_INTERNAL_FAIL_TIMEOUT	-10005	internal timeout

Example:

import MetaTrader5 as mt5
# display data on the MetaTrader 5 package
print("MetaTrader5 package author: ",mt5.__author__)
print("MetaTrader5 package version: ",mt5.__version__)

# establish connection to the MetaTrader 5 terminal
if not mt5.initialize():
print("initialize() failed, error code =",mt5.last_error())
quit()

# shut down connection to the MetaTrader 5 terminal
mt5.shutdown()