打开一个mdl文件的时候，出现warning: Unable to load model file 'C:\Documents and Settings\Hou Yifei\桌面\travail3.mdl' due to the presence of characters that are not supported in the current character encoding setting 'GBK'. Either:
1) run "bdclose all; set_param(0,'CharacterEncoding', Enc)" where Enc is one of Shift_JIS, windows-1252, ISO-8859-1, then load the model, or
2) remove the unsupported characters. The first such character occurs on line 645, byte offset 19.
> In general\private\openmdl at 13
In open at 141
In uiopen at 181

请问这是怎么回事。哪位高人能指点一二，不胜感激！