I bought a Picstart Plus developer tool. It works on my computer under Windows 3.1 perfectly, but I want use it under Windows NT 4.0. (with Service Pack 3) I installed the MPLAB 3.31 and 3.4 successfully under NT, but when I start reading from a PIC, both of them produce the following error message: Communication Error Command [8D] not echoed properly [AB]. Could you help me, what's going on here? mailto:pellerb@inf.bme.hu Balazs Peller TUB