Hi,
Thanks, now I understeand
Looks a strange problem. A workaround could be to spit your addresses into chuncks of 200..400 and operate the chuncks sequential.
Maybe Mappoint has a problem because the calling application is not responding ? You can simple try this out by calling the message pump in your loop.
Be aware that if you call windows message pump your code can get re-entered and you have to do it different in final release. Bur for test it is quick tested if that whas the proble.