I've noticed when using MPLab v5.3.1, that if one is using COM1 for the ICD, and COM2 continuously for data retrieval, that switching tasks in Win 2k makes MPLab crash and the ICD have a stack error. Has anyone else noticed this behaviour? How do I fix it? Cheers, Shane. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads