Thank you, phildunlap.
I've got exception stack trace like next.
com.serotonin.bacnet4j.exception.BACnetTimeoutException: No response from instanceId XXXXX
com.serotonin.bacnet4j.util.RemoteDeviceFinder$DeviceFutureImpl.get(RemoteDeviceFinder.java:176)
com.serotonin.bacnet4j.LocalDevice$2.get(LocalDevice.java:705)

Also I use timeout related code like the following.

Transport transport = new DefaultTransport(network);
transport.setTimeout(30000);
transport.setSegTimeout(30000);

RemoteDeviceFuture dd = localDevice.getRemoteDevice(XXXXX);
RemoteDevice d = dd.get(90000);
I think this is the bacnet device's problem now, but if I've not use the code correctly, I hope to know about it.

Thank you.
But the content of the link says it relates java option matter, it seems doubtful a little for me about it.
I'll try it anyway.

Thank you for your answering.
I realized that instaceId == deviceId ,later.
I could do what I want as below.
RemoteDeviceFuture dd = localDevice.getRemoteDevice(instaceId );
RemoteDevice d = dd.get();
The bug what I got seems being resolved with getRemoteDevice() of Bacnet4J 4.X.
thank you.