MetaTrader 4.0 Error Codes
The GetLastError() function returns the last error code. The Error code constants are defined in the stderror.mqh file.
To print text messages use the ErrorDescription() function defined in the stdlib.mqh file.
The following table lists the MQL Error codes returned from the trade server.
|
Constant |
Value |
Description |
| 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 order too close to market. |
| ERR_TRADE_CONTEXT_BUSY | 146 | Trade context is busy. |
MQL4 run time error codes
|
Constant |
Value |
Description |
| 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 array. |
| ERR_NO_MEMORY_FOR_ARRAYSTRING | 4010 | No memory for 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 (never generated error). |
| 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 | Expert function calls are not allowed. |
| ERR_NOT_ENOUGH_MEMORY_FOR_RETURNED_STRING | 4021 | Not enough memory for temp string returned from function. |
| ERR_SYSTEM_BUSY | 4022 | System is busy (never generated error). |
| 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 | Send mail 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_END_OF_FILE | 4099 | End of 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 exists already. |
| 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. |