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I am trying to insert an image from Inkscape. I saved it as a pdf, checking the PDF + Latex option.
Inside my Latex file, I wrote the following code :


but when i try to compile using pdflatex, it gives me the following error message:

ERROR: Undefined control sequence.  

--- TeX said ---  
<argument> \includegraphics  
                            [width=\unitlength ]{topo4serv.pdf}
l.52 ...raphics[width=\unitlength]{topo4serv.pdf}}

In the output pdf file the text of the svg file is there but not the shapes...
If someone has an answer i would be very grateful.

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Welcome to TeX.SX! Did you say \usepackage{graphicx} in your document? – egreg Jun 29 '12 at 13:45
First time I am seeing something like topo4serv.pdf_tex. I would rather say \includegraphics{topo4serv.pdf} – azetina Jun 29 '12 at 14:21
@azetina Usage seems correct as it is stated here: tug.ctan.org/tex-archive/info/svg-inkscape – interlude Jun 29 '12 at 15:14
It is correct to use \input{file.pdf_tex}. If you open that file, it has instructions for its usage. Like egreg said, you need to have \usepackage{graphicx} in your preamble for this to work. – Scribblemacher Jun 29 '12 at 17:45
up vote 5 down vote accepted

\includegraphicsis giving error because it is not defined, which means you need to \usepackage{graphicx} on document's preamble

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