In-Reply-To: <201111081554.pA8FsqGL024108@mailhub-dmz-3.mit.edu> Electron, > After trying everything, I got the idea the problem was that installing > v8.80 on top of v8.76 must have created some sort of malfunctioning hybri= d. >=20 > I gave a look at Windows' "Add or Remove programs", and found that I not > only had installed v8.80 (of course), but the v8.76 was still there (same > installation path of v8.80 by the way)!!! and v8.10 too!!!!! >=20 > It looks like installing v8.80 on top of v8.76 hasn't upgraded anything, > it has just made one non-working system from two. >=20 > I uninstalled all of them, then reinstalled v8.80. Now it works like a > charm. :-) Please note that the printf problem remains, it's just that I'= m > not using it so.. it's v8.80 for me, for you it maybe v8.76 if you need > printf, but be aware that some new chips are supported only by v8.80 Yes it's always been essential to uninstall any old MPLAB versions first, a= nd=20 as far as I remember it clearly says this is so in the installation=20 instructions. Brian Gregory. briang@cix.compulink.co.uk --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .