It seems to me that the one thing that changed was "reloading the library o= n=20 the Dataman S4". This is certainly where I would look closely. A different= =20 rev of the software for the programmer, maybe? Incorrectly specifying the=20 target device to the programmer? -- Bob Ammerman RAm Systems --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .