Dear Sir or Madam, I reported a bug on github, and the maintainers advised me to inform the authors of preview-latex: pdfLaTeX fails on pstool when hyperref is included · Issue #166 · latex3/hyperref (github.com). The original bug report, a minimum example and all needed files are posted there. I would be absolutely willing to support the clarification of the issue. Please inform me how to formally submit the bug report. Thanks and best wishes, Tobias Bruckmann Dr.-Ing. Tobias Bruckmann Universität Duisburg-Essen, Campus Duisburg Fakultät für Ingenieurwissenschaften Abteilung Maschinenbau und Verfahrenstechnik Lehrstuhl für Mechatronik Lotharstraße 1, MD 334 47057 Duisburg Mobil: +49 (0) 170 / 639 2859 Tel.: +49 (0) 203 / 379 - 1908 Fax: +49 (0) 203 / 379 – 4494 E-Mail: mailto:tobias.bruckmann@uni-due.de Internet: http://www.uni-due.de/mechatronik