MT4 Errors List

ERR_NO_ERROR 0 No error returned.
ERR_NO_RESULT 1 No error returned, but the result is unknown.
ERR_COMMON_ERROR 2 Common error.
ERR_INVALID_TRADE_PARAMETERS 3 Invalid trade parameters.
ERR_SERVER_BUSY 4 Trade server is busy.
ERR_OLD_VERSION 5 Old version of the client terminal.
ERR_NO_CONNECTION 6 No connection with trade server.
ERR_NOT_ENOUGH_RIGHTS 7 Not enough rights.
ERR_TOO_FREQUENT_REQUESTS 8 Too frequent requests.
ERR_MALFUNCTIONAL_TRADE 9 Malfunctional trade operation.
ERR_ACCOUNT_DISABLED 64 Account disabled.
ERR_INVALID_ACCOUNT 65 Invalid account.
ERR_TRADE_TIMEOUT 128 Trade timeout.
ERR_INVALID_PRICE 129 Invalid price.
ERR_INVALID_STOPS 130 Invalid stops.
ERR_INVALID_TRADE_VOLUME 131 Invalid trade volume.
ERR_MARKET_CLOSED 132 Market is closed.
ERR_TRADE_DISABLED 133 Trade is disabled.
ERR_NOT_ENOUGH_MONEY 134 Not enough money.
ERR_PRICE_CHANGED 135 Price changed.
ERR_OFF_QUOTES 136 Off quotes.
ERR_BROKER_BUSY 137 Broker is busy.
ERR_REQUOTE 138 Requote.
ERR_ORDER_LOCKED 139 Order is locked.
ERR_LONG_POSITIONS_ONLY_ALLOWED 140 Long positions only allowed.
ERR_TOO_MANY_REQUESTS 141 Too many requests.
ERR_TRADE_MODIFY_DENIED 145 Modification denied because an order is too close to market.
ERR_TRADE_CONTEXT_BUSY 146 Trade context is busy.
ERR_TRADE_EXPIRATION_DENIED 147 Expirations are denied by broker.
ERR_TRADE_TOO_MANY_ORDERS 148 The amount of opened and pending orders has reached the limit set by a broker.

MQL4 run time error

ERR_NO_MQLERROR 4000 No error.
ERR_WRONG_FUNCTION_POINTER 4001 Wrong function pointer.
ERR_ARRAY_INDEX_OUT_OF_RANGE 4002 Array index is out of range.
ERR_NO_MEMORY_FOR_FUNCTION_CALL_STACK 4003 No memory for function call stack.
ERR_RECURSIVE_STACK_OVERFLOW 4004 Recursive stack overflow.
ERR_NOT_ENOUGH_STACK_FOR_PARAMETER 4005 Not enough stack for parameter.
ERR_NO_MEMORY_FOR_PARAMETER_STRING 4006 No memory for parameter string.
ERR_NO_MEMORY_FOR_TEMP_STRING 4007 No memory for temp string.
ERR_NOT_INITIALIZED_STRING 4008 Not initialized string.
ERR_NOT_INITIALIZED_ARRAYSTRING 4009 Not initialized string in an array.
ERR_NO_MEMORY_FOR_ARRAYSTRING 4010 No memory for an array string.
ERR_TOO_LONG_STRING 4011 Too long string.
ERR_REMAINDER_FROM_ZERO_DIVIDE 4012 Remainder from zero divide.
ERR_ZERO_DIVIDE 4013 Zero divide.
ERR_UNKNOWN_COMMAND 4014 Unknown command.
ERR_WRONG_JUMP 4015 Wrong jump.
ERR_NOT_INITIALIZED_ARRAY 4016 Not initialized array.
ERR_DLL_CALLS_NOT_ALLOWED 4017 DLL calls are not allowed.
ERR_CANNOT_LOAD_LIBRARY 4018 Cannot load library.
ERR_CANNOT_CALL_FUNCTION 4019 Cannot call function.
ERR_EXTERNAL_EXPERT_CALLS_NOT_ALLOWED 4020 EA function calls are not allowed.
ERR_NOT_ENOUGH_MEMORY_FOR_RETURNED_STRING 4021 Not enough memory for a string returned from a function.
ERR_SYSTEM_BUSY 4022 System is busy.
ERR_INVALID_FUNCTION_PARAMETERS_COUNT 4050 Invalid function parameters count.
ERR_INVALID_FUNCTION_PARAMETER_VALUE 4051 Invalid function parameter value.
ERR_STRING_FUNCTION_INTERNAL_ERROR 4052 String function internal error.
ERR_SOME_ARRAY_ERROR 4053 Some array error.
ERR_INCORRECT_SERIES_ARRAY_USING 4054 Incorrect series array using.
ERR_CUSTOM_INDICATOR_ERROR 4055 Custom indicator error.
ERR_INCOMPATIBLE_ARRAYS 4056 Arrays are incompatible.
ERR_GLOBAL_VARIABLES_PROCESSING_ERROR 4057 Global variables processing error.
ERR_GLOBAL_VARIABLE_NOT_FOUND 4058 Global variable not found.
ERR_FUNCTION_NOT_ALLOWED_IN_TESTING_MODE 4059 Function is not allowed in testing mode.
ERR_FUNCTION_NOT_CONFIRMED 4060 Function is not confirmed.
ERR_SEND_MAIL_ERROR 4061 Mail sending error.
ERR_STRING_PARAMETER_EXPECTED 4062 String parameter expected.
ERR_INTEGER_PARAMETER_EXPECTED 4063 Integer parameter expected.
ERR_DOUBLE_PARAMETER_EXPECTED 4064 Double parameter expected.
ERR_ARRAY_AS_PARAMETER_EXPECTED 4065 Array as parameter expected.
ERR_HISTORY_WILL_UPDATED 4066 Requested history data in updating state.
ERR_TRADE_ERROR 4067 Some error in trade operation execution.
ERR_END_OF_FILE 4099 End of a file.
ERR_SOME_FILE_ERROR 4100 Some file error.
ERR_WRONG_FILE_NAME 4101 Wrong file name.
ERR_TOO_MANY_OPENED_FILES 4102 Too many opened files.
ERR_CANNOT_OPEN_FILE 4103 Cannot open file.
ERR_INCOMPATIBLE_ACCESS_TO_FILE 4104 Incompatible access to a file.
ERR_NO_ORDER_SELECTED 4105 No order selected.
ERR_UNKNOWN_SYMBOL 4106 Unknown symbol.
ERR_INVALID_PRICE_PARAM 4107 Invalid price.
ERR_INVALID_TICKET 4108 Invalid ticket.
ERR_TRADE_NOT_ALLOWED 4109 Trade is not allowed.
ERR_LONGS_NOT_ALLOWED 4110 Longs are not allowed.
ERR_SHORTS_NOT_ALLOWED 4111 Shorts are not allowed.
ERR_OBJECT_ALREADY_EXISTS 4200 Object already exists.
ERR_UNKNOWN_OBJECT_PROPERTY 4201 Unknown object property.
ERR_OBJECT_DOES_NOT_EXIST 4202 Object does not exist.
ERR_UNKNOWN_OBJECT_TYPE 4203 Unknown object type.
ERR_NO_OBJECT_NAME 4204 No object name.
ERR_OBJECT_COORDINATES_ERROR 4205 Object coordinates error.
ERR_NO_SPECIFIED_SUBWINDOW 4206 No specified subwindow.
ERR_SOME_OBJECT_ERROR 4207 Some error in object operation.