My sin in MPLAB/ Hitech C's eyes is not to use the default directory or drive letter. For some reason MPLab 8.40 only recognises the Hitech C directory if Hitech; 1) is installed in the 'c' directory (C:\Program Files (x86)\HI-TECH Software\PICC\PRO\9.65\bin) and nowhere else. 2. MPLAB is installed in a root folder of whatever drive letter is chosen (H:\Microchip\MPLAB IDE) Previously, I had MPLAB one extra layer down and whilst it worked OK with Microchip C and CCS, Hitech it just wouldn't remember it's location. I recall many moons ago, MPLAB didn't like being anywhere but the root directory of the root drive. Looks as though it is possible the 'plugin' for Hitech C has it's path hard coded rather than taking it from the actual installation path. This is annoying, as I try not to install programs on the drive containing the OS. Colin -- cdb, colin@btech-online.co.uk on 11/1/2009 Web presence: www.btech-online.co.uk Hosted by: www.1and1.co.uk/?k_id=7988359 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist