2023.04.13 14:08 "Re: [Tiff] TIffWriteDirectory() causes problems", by David C. Partridge

Yes, I am setting rowsPerStrip myself

                    unsigned int rowsPerStrip = STRIP_SIZE_DEFAULT / scanLineSize; 

                    ZTRACE_RUNTIME("Seting TIFFTAG_ROWSPERSTRIP to: %u", rowsPerStrip); 
                    TIFFSetField(m_tiff, TIFFTAG_ROWSPERSTRIP, rowsPerStrip);

And prewriting the empty encoded strips worked a treat!!

Thanks a lot