The Olex A2Z 2027 edition will be held from April 5th to 8th, 2027 in Dubrovnik, Croatia. The OLEX2 duo, Horst Puschmann and Florian Kleemiss, will guide participants through the software’s capabilities — from installation and initial configuration to solving cases of severe structural disorder, advanced treatment of hydrogen atoms, and aspherical and anharmonic refinement. Participants will have the opportunity to submit their interesting or “unsolvable” structures in advance, so that possible approaches to problem‑solving can be demonstrated during the workshop itself. We look forward to welcoming you in Dubrovnik.