MQL4 Reference Standard Constants, Enumerations and Structures Codes of Errors and Warnings Trade Server Return Codes

Trade Server Return Codes

GetLastError() - returns error codes. Error codes are defined in stderror.mqh. To print the error description you can use the ErrorDescription() function, defined in stdlib.mqh.

Example:

#include <stderror.mqh>
#include <stdlib.mqh>
void SendMyMessage(string text)
  {
   int check;
   SendMail("Test", text);
   check=GetLastError();
   if(check!=ERR_NO_ERROR) Print("Message not sent. Error: ",ErrorDescription(check));
  }

Code

ID

Description

0

ERR_NO_ERROR

No error returned

1

ERR_NO_RESULT

No error returned, but the result is unknown

2

ERR_COMMON_ERROR

Common error

3

ERR_INVALID_TRADE_PARAMETERS

Invalid trade parameters

4

ERR_SERVER_BUSY

Trade server is busy

5

ERR_OLD_VERSION

Old version of the client terminal

6

ERR_NO_CONNECTION

No connection with trade server

7

ERR_NOT_ENOUGH_RIGHTS

Not enough rights

8

ERR_TOO_FREQUENT_REQUESTS

Too frequent requests

9

ERR_MALFUNCTIONAL_TRADE

Malfunctional trade operation

64

ERR_ACCOUNT_DISABLED

Account disabled

65

ERR_INVALID_ACCOUNT

Invalid account

128

ERR_TRADE_TIMEOUT

Trade timeout

129

ERR_INVALID_PRICE

Invalid price

130

ERR_INVALID_STOPS

Invalid stops

131

ERR_INVALID_TRADE_VOLUME

Invalid trade volume

132

ERR_MARKET_CLOSED

Market is closed

133

ERR_TRADE_DISABLED

Trade is disabled

134

ERR_NOT_ENOUGH_MONEY

Not enough money

135

ERR_PRICE_CHANGED

Price changed

136

ERR_OFF_QUOTES

Off quotes

137

ERR_BROKER_BUSY

Broker is busy

138

ERR_REQUOTE

Requote

139

ERR_ORDER_LOCKED

Order is locked

140

ERR_LONG_POSITIONS_ONLY_ALLOWED

Buy orders only allowed

141

ERR_TOO_MANY_REQUESTS

Too many requests

145

ERR_TRADE_MODIFY_DENIED

Modification denied because order is too close to market

146

ERR_TRADE_CONTEXT_BUSY

Trade context is busy

147

ERR_TRADE_EXPIRATION_DENIED

Expirations are denied by broker

148

ERR_TRADE_TOO_MANY_ORDERS

The amount of open and pending orders has reached the limit set by the broker

149

ERR_TRADE_HEDGE_PROHIBITED

An attempt to open an order opposite to the existing one when hedging is disabled

150

ERR_TRADE_PROHIBITED_BY_FIFO

An attempt to close an order contravening the FIFO rule