Hello, Goal: Design of a 60MWac single axis tracker (N-S) with back tracking. The system has two fields and when I draw the layout using shading module it crashes. Can PVsyst compute these calculations or would I need a more powerful system. Software version: PVsyst 6.62. Computer Specifications: Processor: i7-6700 @ 2.6GHz RAM: 16.0 GB OS: Win 10 Home, 64 bit OS Display Driver: GTX 965M All drivers are updated. Please let me know what else can I try. Thank, Shash