Add error checking
Add error checking

jmerkow/VTK,collects/VTK,berendkleinhaneveld/VTK,mspark93/VTK,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,demarle/VTK,ashray/VTK-EVM,arnaudgelas/VTK,jeffbaumes/jeffbaumes-vtk,berendkleinhaneveld/VTK,spthaolt/VTK,sgh/vtk,berendkleinhaneveld/VTK,johnkit/vtk-dev,hendradarwin/VTK,berendkleinhaneveld/VTK,SimVascular/VTK,arnaudgelas/VTK,demarle/VTK,arnaudgelas/VTK,biddisco/VTK,SimVascular/VTK,aashish24/VTK-old,collects/VTK,johnkit/vtk-dev,sgh/vtk,ashray/VTK-EVM,jeffbaumes/jeffbaumes-vtk,msmolens/VTK,collects/VTK,sumedhasingla/VTK,cjh1/VTK,sgh/vtk,keithroe/vtkoptix,ashray/VTK-EVM,sankhesh/VTK,biddisco/VTK,spthaolt/VTK,aashish24/VTK-old,demarle/VTK,candy7393/VTK,msmolens/VTK,johnkit/vtk-dev,demarle/VTK,collects/VTK,johnkit/vtk-dev,gram526/VTK,hendradarwin/VTK,sumedhasingla/VTK,biddisco/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,candy7393/VTK,gram526/VTK,cjh1/VTK,naucoin/VTKSlicerWidgets,naucoin/VTKSlicerWidgets,hendradarwin/VTK,keithroe/vtkoptix,hendradarwin/VTK,mspark93/VTK,cjh1/VTK,daviddoria/PointGraphsPhase1,candy7393/VTK,jeffbaumes/jeffbaumes-vtk,naucoin/VTKSlicerWidgets,johnkit/vtk-dev,demarle/VTK,arnaudgelas/VTK,ashray/VTK-EVM,jmerkow/VTK,keithroe/vtkoptix,spthaolt/VTK,jmerkow/VTK,naucoin/VTKSlicerWidgets,sankhesh/VTK,gram526/VTK,johnkit/vtk-dev,daviddoria/PointGraphsPhase1,gram526/VTK,naucoin/VTKSlicerWidgets,mspark93/VTK,mspark93/VTK,demarle/VTK,aashish24/VTK-old,hendradarwin/VTK,candy7393/VTK,biddisco/VTK,cjh1/VTK,sumedhasingla/VTK,keithroe/vtkoptix,sumedhasingla/VTK,mspark93/VTK,candy7393/VTK,sankhesh/VTK,SimVascular/VTK,candy7393/VTK,spthaolt/VTK,sankhesh/VTK,jmerkow/VTK,collects/VTK,candy7393/VTK,aashish24/VTK-old,keithroe/vtkoptix,biddisco/VTK,ashray/VTK-EVM,SimVascular/VTK,daviddoria/PointGraphsPhase1,Wuteyan/VTK,gram526/VTK,jmerkow/VTK,hendradarwin/VTK,daviddoria/PointGraphsPhase1,ashray/VTK-EVM,Wuteyan/VTK,mspark93/VTK,sankhesh/VTK,ashray/VTK-EVM,sgh/vtk,jmerkow/VTK,SimVascular/VTK,jeffbaumes/jeffbaumes-vtk,mspark93/VTK,candy7393/VTK,spthaolt/VTK,biddisco/VTK,demarle/VTK,msmolens/VTK,Wuteyan/VTK,msmolens/VTK,sumedhasingla/VTK,jmerkow/VTK,arnaudgelas/VTK,sumedhasingla/VTK,cjh1/VTK,demarle/VTK,sankhesh/VTK,msmolens/VTK,daviddoria/PointGraphsPhase1,arnaudgelas/VTK,Wuteyan/VTK,Wuteyan/VTK,berendkleinhaneveld/VTK,spthaolt/VTK,sumedhasingla/VTK,msmolens/VTK,SimVascular/VTK,sgh/vtk,aashish24/VTK-old,aashish24/VTK-old,spthaolt/VTK,biddisco/VTK,keithroe/vtkoptix,sankhesh/VTK,Wuteyan/VTK,Wuteyan/VTK,gram526/VTK,mspark93/VTK,msmolens/VTK,naucoin/VTKSlicerWidgets,jeffbaumes/jeffbaumes-vtk,sgh/vtk,gram526/VTK,daviddoria/PointGraphsPhase1,msmolens/VTK,sankhesh/VTK,hendradarwin/VTK,cjh1/VTK,sumedhasingla/VTK,collects/VTK,jmerkow/VTK,keithroe/vtkoptix,ashray/VTK-EVM,berendkleinhaneveld/VTK,SimVascular/VTK,gram526/VTK