I am a Newb to MT4 and MQL. I have placed eight EAs on one MT4 instance. I developed these EAs on a 30m time frame, but I am using a 1m Timeframe for testing purposes.
I receive the error "Cannot change existing previous pending order with ticket: 1984613, reason: 1". ("Program has been deleted from the chart")
This error occurs in between zero and two EAs per 1m cycle, but it switches between the various EAs. An EA that threw this error in one cycle is more likely to throw the error in the next cycle, but the error never persists for long (two or three cycles at most).
From the error description, it sounds as though the EAs are not actively attached to charts at the time of the error, but I have checked all the EAs and all are loaded onto separate charts at the times of the errors. What causes this?