关于DRC检查出的DIFF类型的错误

haonan

做DRC的时候检查出这个错误：
Check DIFF.C4.C5{
@Min. Space of opposite type diff in same well is 0.57um
@Butting source and tap is allowed
EXT PDIFF NTAP>0<0.57ABUT>0<90 SIGULAR REGION INSIDE ALSO//butting is allowed
EXT NDIFF PTAP>0<0.57ABUT>0<90 SIGULAR REGION INSIDE ALSO//butting is allowed
}
这是什么错误啊？这种错误应该怎样改呢？请哪位高手指点一下。