生成网表时报下面的错误

sonoma

老大们：

生成网表时报下面的错误，是什么原因哪？！求救！

******************************************************************************** * * Create Netlist * ******************************************************************************** Netlist Format: allegro.dll Design Name: E:\WORK\WW\I915P4N\I915P4NV11\HX_I915P4N7.DSN ERROR [NET0021] Cannot get part. [FMT0024] Ref-des not found. Possible Logical/Physical annotation conflict. [FMT0018] Errors processing intermediate file