错误的文件名或命令。
Most Web developers check bad file references, but it's worth mentioning.
大部分 Web 开发人员都会检查错误的文件引用,但是这里仍然需要说明一下。
If the message says "bad file number", the specified file may have been closing in the foreground while compiling in the background.
如果讯息指出“错误的档案编号”,则指定的档案在背景编译的同时,可能已于前景关闭。
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