用正版的软件，删除并重新定义部分的embedded pile 之后，mesh检查点和线之类的时候都没有问题，不知道为啥mesh的时候成这样了。
由于以下错误导致网格划分失败:
Trying to fetch named item "UP" number 0, but it does not exist.
Original call stack:
0092d0fc +0e4 Plaxis3DInput.exe MeshReader_M3O 378 +12 TMeshReader_M3O.GetElementGroupFromList
0092160d +07d Plaxis3DInput.exe MeshReader_Virtual 772 +11 TMeshReader_Virtual.FilterAndMapUserElements
0092230f +05f Plaxis3DInput.exe MeshReader_Virtual 1142 +13 TMeshReader_Virtual.PostProcess
00921588 +01c Plaxis3DInput.exe MeshReader_Virtual 746 +4 TMeshReader_Virtual.Execute
009466cf +333 Plaxis3DInput.exe FEMPreProcessingTool 1607 +81 TFEMPreProcessingTool.ConvertMeshOutFile
00943ea3 +60f Plaxis3DInput.exe FEMPreProcessingTool 1302 +138 TFEMPreProcessingTool.GenerateMesh
00940d37 +0bb Plaxis3DInput.exe FEMPreProcessingTool 349 +14 TFEMPreProcessingTool.Execute
00601b98 +048 Plaxis3DInput.exe PlxTasks 656 +7 TPlxTask.ExecuteWrapped
0060141e +042 Plaxis3DInput.exe PlxTasks 490 +9 ThreadProc
00406764 +028 Plaxis3DInput.exe System 59 +0 ThreadWrapper
0045c531 +00d Plaxis3DInput.exe madExcept CallThreadProcSafe
0045c59b +037 Plaxis3DInput.exe madExcept ThreadExceptFrame
>> created by main thread ($2360) at:
00602152 +032 Plaxis3DInput.exe PlxTasks 850 +1 TPlxTask.StartThreaded
