Dear all,<BR>I have some problem accessing point data that should have been generated by the vtkExtractTensorComponents filter. I read the data, pass them to the filter and later pass the filters output to a writer. This works. However when I try to access the data directly as shown below I get a NULL pointer:<BR> <BR>vtkPointData *pointData = myTensorCompExtractor->GetOutput()->GetPointData();<BR>pointData->getNumberOfArrays() // this returns 1, so there is an array<BR>pointData->GetArray(0)->GetName() // this crashes as GetArray(0) returns a NULL pointer<BR> <BR>Does somebody have an idea what is going wrong? I already tried pointData->Update() or myTensorCompExtractor->Update().<BR> <BR>Some help would be appreciated!<BR>Kind regards,<BR>Bjoern<BR><BR>------------------------------------------------------------------------- <BR>Dr. Bjoern Zehner <BR>UFZ Centre for Environmental Research Leipzig-Halle <BR>Permoserstrasse 15 <BR>04318 Leipzig <BR>Germany <BR>http://www.ufz.de/index.php?en=5673 <BR>Tel: ++49 (341) 235 1979 <BR>Fax: ++49 (341) 235 1939<BR><BR>