This bug is temporary fixed by assigning m_Body after the image assignment.
See below:

void ImageMessage2::SetScalarPointer(void * p)
{
if (this->m_SelfAllocatedImage && this->m_Image)
{
this->m_SelfAllocatedImage = 0;
this->m_ImageSize = 0;

delete [] this->m_Image;
}

this->m_Image = (unsigned char *) p;
for (int i = 0;i<IGTL_IMAGE_HEADER_SIZE; i++)
{
this->m_Body[i] = m_ImageHeader[i];
}
for (int i = 0;i<GetImageSize(); i++)
{
this->m_Body[i+IGTL_IMAGE_HEADER_SIZE] = m_Image[i];
}
}

Is this still an issue?

Hi,

The version of OpenIGTLink used in Slicer is recent (from June 28), if this is still a problem, consider submitting a pull request on https://github.com/openigtlink/OpenIGTLink

Thanks