MT4 · Runtime errors
MT4 4022 · System is busy (never generated error) | YI GOLD
ERR_SYSTEM_BUSY
Official meaning
System is busy (never generated error)
Possible causes · YI GOLD suggestions
Concurrent requests, server load or rate limits prevent this operation.
Troubleshooting · YI GOLD suggestions
Serialize account requests, verify previous outcomes, reduce frequency and use bounded backoff.