Anyone with the same problem, or anyone which has not that problem please tell me. Since today, partial filled orders on IDEAL (not ideal pro) are not able to be modified. No modify of price or size possible. Message from TWS: "order is being cancelled". But order still live and green. Only possible way is to cancel that order indeed. Thanks for your answer. Merkur p.s. Please: note the topic, nothing else like problems with Idealpro etc. Thx.