WriteToOutputStringOn() not working in vtkSTLWriter

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

A CMake project demonstrating this issue can be found here: https://github.com/hrobeers/VTK_StlWriteToStringIssue

The detailed description can be found in the README file, or below:

StlWriteIssue

This repository contains code to reproduce an issue with writing an STL file to a binary string.

The issue

To make the vtkSTLWriter object write to a string instead of a file, the following method is called: WriteToOutputStringOn().

When calling the Write() method, vtk produces the following error message: "vtkSTLWriter (0x823bac0): Please specify FileName to write". Why should a FileName be specified when writing to a binary string?

The GetOutputString() method returns a null pointer, so vtkSTLWriter didn't write to the OutputString.

How to reproduce?

Run the following scripts in the current folder:

$ ./build.sh

$ ./run.sh

Details

Tested on:

Arch Linux
vtk-5.10
gcc 4.9.2