Hello, I've been trying to compile my document using XeTeX and it gives me the following error: ! Emergency stop. <to be read again> b \setPDFmediabox ...#3 #4 #5]#6\done ->\dimen 2=#2b p\dimen 2=-\dimen 2 \dimen... \checkPDFmediabox ...se \setPDFmediabox #2#3\done \fileprocessedtrue \fi \doprocessline ... to \fileline \doprocessPDFline \relax \expandafter \dopro... \dogetPDFmediabox ...chread {#1}\doprocessPDFline \egroup \ifx \PDFxoffset \... \getfiguredimensionsA ...heightb } \executedfalse \ifexecuted \donetrue \ifd... ... l.40 [height=.25\textheight] } It comes from the following code. \placefigure [here] [fig:cell_type_diag] {Typical diagram of the main cell types \cite[Web:2006aa], \cite[Web:2006ab]} \startcombination[2*1] { \externalfigure[chp1_prokaryote_diagram] [height=.25\textheight] }{Prokaryote} { \externalfigure[chp1_eukaryote_diagram] [height=.25\textheight] } {Eukaryote} \stopcombination Any ideas? Thanks, Pepe