System date: 25.05.2009 Main Licensing Error: failed to get n Input data file name > input file name: EQRN400_30_full_model_1900.bst Starting calculation FATALERROR 200111 CYLINDER 1 BST_PIPE_END_SOS 698.45 DEGCRA Invalid speed of sound calculation. Ratio of specific heats: 1.30627 Gas constant: 296.336 Temperature: NaN Problem occurs at attachment to pipe : 5 Pipe end number : 10 The calculation has been stopped. 问题出在管5和管10这 对吗?一般会是什么样的问题啊?怎么我找不出来啊?还请高人指点啊