VTK complained a bit

[datian3d]

When opening a model at the first time, there is a pop up window "vtkOutputWindow", which contains the error message as below:

ERROR: In ....\VTK5.10.1-Qt\Filtering\vtkDemandDrivenPipeline.cxx, line 727
vtkStreamingDemandDrivenPipeline (00000294CABA0270): Input port 0 of algorithm vtkAppendPolyData(00000294C9D99D30) has 0 connections but is not optional.

ERROR: In ....\VTK5.10.1-Qt\Filtering\vtkDemandDrivenPipeline.cxx, line 727
vtkStreamingDemandDrivenPipeline (00000294CABA0270): Input port 0 of algorithm vtkAppendPolyData(00000294C9D99D30) has 0 connections but is not optional.

Also, when starting the slicing, there is a message from the python console,

VTK Warning: Warning: In ....\VTK5.10.1-Qt\Graphics\vtkMassProperties.cxx, line 120
vtkMassProperties (00000294CAB981F0): Input data type must be VTK_TRIANGLE not 9

All these messages didn't not seem to be fatal, and the software seemed to load and slice ok.

The test was based on the monkey head model and 1.14.1 64bit windows package.

[ZHBGITHUB666]

Have you solved it？？？