I have a solution to reduce "Modify error and Trade is disable".
By using Virtual Pending Order, following comparison (Jun-Dec 2017)
1. Pending_Order = true and Virtual_Pending = false BT results at most but many errors (default).
2. Pending_Order = false BT results 40% of option 1, but no error.
3. Pending_Order = true and Virtual_Pending = true, BT result 80% of option 1, error about 1% of error option 1. (*new).
Note : Option no 3 has not been tested Live.
Rgds.
margiyono61 gmail com, Telegr @Margiyono