我做后仿真时一直出现下面的错误 Error: (vopt-1939) SDF compilation of file D:/dds ise/dds/netgen/par/dds_timesim.sdf terminated with code 1.
# ** Warning: D:/shixufangzhen/dds_timesim.v(293): Unable to access $sdf_annotate file pathname netgen/par/dds_timesim.sdf for reading. 大家能不能帮我解决一下，谢谢 | 
