1Known Problems with some *roff versions 2 3If you encounter the error: 4 5Unknown escape sequence in input: 33, 133 6 7when trying to create op.txt then set the GROFF_NO_SGR environment 8variable (see grotty(1) man page), e.g., 9 10csh% setenv GROFF_NO_SGR 1 11sh$ GROFF_NO_SGR=1; export GROFF_NO_SGR 12 13$Id: README,v 8.1 2004-07-20 20:25:10 ca Exp $ 14