[vtkusers] VTK error handling

[John Fraser]

Hello,

I was wondering if anyone can give some advice on VTK and error / exception handling.  For example, if I have something like this:

vtkSmartPointer<vtkImageReader> imageReader = vtkSmartPointer<vtkImageReader>::New();
imageReader->SetFileName("NoSuchFile.bin");
... etc
imageReader->Update();

NoSuchFile.bin does not exist.  Now when Update is executed an error window pops up (which I can remove by setting a vtkFileOutputWindow instead), but how can I checked programmatically that the Update did not succeed due to the file not being found or out of memory, etc?  I have tried, try/catch and GetErrorCode (which always seems to return 0?) and looked through the books but there is no mention of error handling.

John

The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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