Hi Zheng, I'm sorry for the trouble! I have heard of a few cases of this, and seems to occur if your PATH is very very long. Try this: echo $PATH Do you get a path that is many lines long? If so, try using set PATH ..... and put in all the critical parts of your PATH and skip all the parts that are not relevant to phenix. Then echo $PATH to be sure, and then try (in that window) your phenix command. With luck, that should do it. If not, let me know and send me the results of echo $PATH before and after and I will try to help. All the best, Tom T Hi, All I am new to phenix. I met the following error when I run autobuild. I also found the following link from Dr. Lang asking the similar question. But I didn't find a clear solution. Thanks for your help. http://www.phenix-online.org/pipermail/phenixbb/2008-June/001087.html Starting job 1... ******************************************************************************** Failed to carry out AutoBuild_build_cycle: child process stderr output: command: 'csh /home/zz/AutoBuild_run_1_/TEMP0/RUN_FILE_1' Word too long. ******************************************************************************** Zheng _______________________________________________ phenixbb mailing list [email protected] http://www.phenix-online.org/mailman/listinfo/phenixbb