Hello GATE users, I've been working on the rotation of the source. I checked through the mailing list and found it should work with "attachTo" command. I tried it with a simple geometry, but never succeeded. Always only the phantom rotates and not the source. The old method using posrot1 and posrot2 worked but the theory behind it is still kinda confusing. My GATE is ver6.2, is there anyone who did rotate the source with "attachTo" command? Thanks. -- Hokkaido University, Graduate school of medicine, medical physics and engineering D1 Taku Yamanaka <a href="mailto:takuyama@med.hokudai.ac.jp" target="_blank">takuyama@med.hokudai.ac.jp</a> --