I have .svg file and convert it to .pdf by inkscape. The conversion seems working fine from its appearance. However, when I include it to my tex environment \includegraphics[width=.9\textwidth]{xxx.pdf} and compile it, I encounter error messages saying " File `xxx.bb' not found. \includegraphics[width=.9\textwidth]{xxx.pdf}." and "Cannot determine size of graphic in xxx.bb (no BoundingBox).\includegraphics[width=.9\textwidth]{xxx.pdf}." So it seems .pdf file converted from .svg fails to have boundary box information. How to fix this problem ? I have other .pdf files converted from .svg via linus rsvg-convert command line, they works fine with tex environment. 

my Inkscape environment

OS: Windows10

Inkscape version: 1.2

Thank you for your help in advance.

Hiroshi