hyperlynx用.ref文件分配model，出现下面的warning，求指导！！

flwlucky

Warning: U1 pin AE18 not loaded from F:\pads Projects\HLBoardSimLink.ref
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  Pin AE18 of component Spartan-3AD has no model in file f:\mentorGraphics\9.3PADS\SDD_HOME\hyperlynx\LIBS\spartan3AD.ibs
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; i- D. |5 s* a+ o6 q& Q: j9 x  Or pin AE18 types differ (e.g. POWER pin found where I/O pin required).
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