Dear Youssef and Tom, I had the same problem. I also emailed the Phenix classified and got a similar response from Tom. In reality, Tom suggestion didn't solve my problem. The funny thing is that in my case PHENIX.Autobuild worked fine for months before suddenly giving the 'Word too long' error. Weird!!! Believe it or not, the only thing I had to do to fix the problem was to uninstall the ARP/wARP package (sorry about that Tassos!). I realized that PHENIX.Autobuilt stopped working properly right when I installed ARP/wARP. I guess there may be a conflict between the two programs (could Phenix read some ARP/wARP library in the wrong directory?), or something like that. I'm not sure. I'm not claiming this is a general solution, but it worked in my case. I hope it will help you! Cheers, Gino ****************************************************************************** Gino Cingolani, Ph.D. Associate Professor Thomas Jefferson University Dept. of Biochemistry & Molecular Biology 233 South 10th Street - Room 826 Philadelphia PA 19107 Office (215) 503 4573 Lab (215) 503 4595 Fax (215) 923 2117 E-mail: [email protected] ****************************************************************************** "Nati non foste per viver come bruti, ma per seguir virtute e conoscenza" ("You were not born to live like brutes, but to follow virtue and knowledge") Dante, The Divine Comedy (Inferno, XXVI, vv. 119-120)