[vtkusers] vtkDataSetWriter problem

[Daniele Giunchi]

Hi All,
I've a problem with a test I performed with vtkDataSetWriter. I create a
class that have two APIs for read or write as binary input string a
vtkDataset (I use vtkDataSetReader and Writer inside it), and I made a
first  test in which I call this class, and set the input in order to return
me the string.
The problem is that if I create an instance of vtkDataSetWriter inside my
class, it returns me an error :

vtkErrorMacro("Input for connection index " << index
                    << " on input port index " << port
                    << " for algorithm " << this->Algorithm->GetClassName()
                    << "(" << this->Algorithm << ") is NULL, but a "
                    << info->Get(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(),
0)
                    << " is required.");

that is in vtkDemandDrivenPipeline.cxx
If the vtkDataSetWriter is created inside my test class, it's all ok. I
don't understand why there is a different behaviour.
I debug the code and I discover that the problem is here:

vtkObjectBase* vtkInformation::GetAsObjectBase(vtkInformationKey* key)

In this function, in the erroneous case the key array and values array are
different from the correct case, and also the hash index
is wrong I suppose, because in the correct case I've always the same entry
(10) that correspond to a polydata, while in the second
case I've 19, that doesn't correspond to anything.

The version I use is vtk 5.2.1.

Any advice?
Thank you very much
best regards,

Daniele


----------------------------------------
Dott. Daniele Giunchi
Software Developer
BioComputing Competence Centre
Super Computing Solutions s.r.l. , CINECA
Via Magnanelli 6/3, 40033 Casalecchio di Reno BO, Italy
http://tinyurl.com/z24zv
http://www.scsolutions.it
mailto:d.giunchi at scsolutions.it
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