The external program'dvipdfm ', which was used to export the file, reported an error. You might wish to look at the document info dialog which you will find in the File-Menu for a precise error report.
La ekstera programo 'dvipdfm' uzata por eksporti la dosieron raportis eraron. Vi povus rigardi la dokumentinforman fenestron en la Dosiero menuo por ricevi detalan eraroprotokolon.