MQL Errors
What do the error codes mean when you try to start an Expert Advisor, use a custom indicator or trade manually? 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 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.
|
|
