M. Kupiec wrote: Hi, thanks for the trace. Unfortunately, it doesn't give any hints as to what the problem is, nor am I able to reproduce the problem using my W7x64 system and Rev D i1pro. How reproducible is the problem ? It fails after the first strip read - does it work if you do that read faster ? Does it fail if you read a very small chart with (say) only 5 patches in a strip ? Graeme Gill.