关于挂国标库

为何挂国标库过程中运行PBC.EXE生成CATLOG文件时，总会出现重名的提示（如下所示），而用PROE打开文件却没发现重名现象，不过在操作系统中的确有相同的文件名。不知有哪位高手能指点迷津呢！
学而知无学　　在这里先多多感谢了！
  
Duplicate file 2: F:\pro_stds\isofastlib/紧固件\Bolts/gb5781.prt
Please rename either one of these files and regenerate the catalog again.
Warning: Found duplicate filenames, gb5781 of type prt,
Duplicate file 1: F:\pro_stds\isofastlib/紧固件\Bolts/gb5781.prt
Duplicate file 2: F:\pro_stds\isofastlib/紧固件\Bolts/gb5781.prt
Please rename either one of these files and regenerate the catalog again.
Warning: Found duplicate filenames, gb5781 of type prt,