The "Bad file number" problem in the csh on 4.1c is not specific to apropos or the csh. The problem is a kernel bug which I fixed a while ago but it may not have made it in all 4.1c tapes. The fix is in biowait in ufs_bio.c; change u.u_error = geterror(bp); to if (u.u_error == 0) u.u_error = geterror(bp); Bill Shannon Sun Microsystems Inc.