Internal Error: Sub-system: CUT, File: /quartus/db/cut/cut_post_syn_util.cpp, Line: 709 name_to_atom_map[iname] == 0

compile led_test的时候出现下面错误：

Internal Error: Sub-system: CUT, File: /quartus/db/cut/cut_post_syn_util.cpp, Line: 709 name_to_atom_map[iname] == 0

 解决方法：删除工程文件目录下的incremental_db文件夹即可。

Internal Error: Sub-system: CUT, File: /quartus/db/cut/cut_post_syn_util.cpp, Line: 709 name_to_atom_map[iname] == 0

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