I've just discovered that my R14 Picstart Plus (v2.30 firmware) won't = program the 18F452, even though the MPLAB v5.50 it came with seems to = support the 18F452. Microchip's website is pushing the PUM module = upgrade, but many people seem to have problems with it. Is there any = reason that an occasional user like myself shouldn't just buy a 17C44 = and load it with the last available firmware version (v3.11)? Rob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist