I am attempting to call Xilinx Impact programming software from Labview, point to an FPGA programming (.bit) file, program the FPGA, then close Impact. I want Labview to control all of the execution so that the operator does not have to interact with Impact, thus automating the programming. I think that I need to use the system exec vi in order to accomplish this, but haven't yet been able to send Impact any commands, other than opening the Impact executable. Can you tell me how to accomplish this?