lingo程序的错误：unable to solve for fixed variable 怎么改正?sets:machine/1..8/:total;line/1..6/:actual;link(machine,line):value;endsetsdata:total=150,79,180,99.5,125,140,95,113.9;value=0.083-0.055-0.07-0.03500.2380.0480.1280.061-0.1030.242
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