[osg-users] Error with InputStream reading osgb files

Riccardo Corsi riccardo.corsi at kairos3d.it
Thu Jun 8 04:15:34 PDT 2017

Hi all,

I'm getting an error when reading some (pretty big) osgb files and having
hard time in finding what's causing the issue.

I'm creating the files myself with osgDB::writeNodeFile, without any error
message when writing them.
The files' contents are only Groups and Geometries with basic data
(vertices, normals, stateset).
The files are created and read with the same osg libraries, version 3.5.3.
The error message I receive on the console (even at DEBUG level) is only:

*Error reading file sample.osgb: read error (InputStream: Failed to read
from stream. At osg::Group )*

with no additional details, as it normally happens when file is not well

Additional info:
- I've spotted the issue for big file (2GB or more), but not always from a
given size up. I have some 4GB files working and some 3GB causing the error.
- in some cases, if I create foo.osgb and bar.osgb they are both loaded
correctly, but if I create foo+bar.osgb (writing works ok) I get the error
when reading it.

Unfortunately I cannot share example files.
I'm looking for some pointers on how to investigate further to find the

My configuration is:
- osg 3.5.3
- windows 10
- visual studio 2013

Thank you,
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