输入mxlindo后提示： mxLINDO (R) Version 9.0.45 Matlab Interface for LINDO API (R) Version 9.0.2040.190, Built Mar  2 2015 22:32:06 Barrier Solver Version 7.1.0.012, Nonlinear Solver Version 3.15P Platform Windows 64x86 (B) Copyright (c) 2001-2014 by LINDO Systems, Inc. All rights reserved.   Usage: [z1,z2,..,zk] = mxLINDO('LSfuncName',a1,a2,...,an) 说明接口应该没问题啊 但我执行M文件报错： mxlindo error: License file not found. mxlindo error: Argument 2 must be a character string in mxlindo('LScreateEnv',...) 求各位大神帮助！