使用mode change,remove 为何出现以下错误？

zjwcq

The part "PART-1" has been imported from the input file.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=259: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=276: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=278: Unknown surface ZHIHU21 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=278: Unknown assembly level surface MAOGAN1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=287: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=289: Unknown surface ZHIHU22 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=289: Unknown assembly level surface MAOGAN8.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=298: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=300: Unknown surface ZHIHU23 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=300: Unknown assembly level surface MAOGAN3.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=309: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=311: Unknown surface ZHIHU24 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=311: Unknown assembly level surface MAOGAN4.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=320: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=322: Unknown surface ZHIHU25 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=322: Unknown assembly level surface MAOGAN7.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=331: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=333: Unknown surface ZHIHU26 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=333: Unknown assembly level surface MAOGAN6.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=342: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=344: Unknown surface ZHIHU27 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=344: Unknown assembly level surface MAOGAN5.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=353: Removal of elements is not yet supported in CAE: (TYPE=ELEMENT).
WARNING in the keyword "*modelchange", file="tunnel.inp", line=355: Unknown surface ZHIHU28 on part instance PART-1-1.
WARNING in the keyword "*modelchange", file="tunnel.inp", line=363: Unknown surface ZHIHU29 on part instance PART-1-1.