1132943SgshapiroKnown Problems with some *roff versions 2132943Sgshapiro 3132943SgshapiroIf you encounter the error: 4132943Sgshapiro 5132943SgshapiroUnknown escape sequence in input: 33, 133 6132943Sgshapiro 7132943Sgshapirowhen trying to create op.txt then set the GROFF_NO_SGR environment 8132943Sgshapirovariable (see grotty(1) man page), e.g., 9132943Sgshapiro 10132943Sgshapirocsh% setenv GROFF_NO_SGR 1 11132943Sgshapirosh$ GROFF_NO_SGR=1; export GROFF_NO_SGR 12132943Sgshapiro 13266527Sgshapiro$Id: README,v 8.1 2004-07-20 20:25:10 ca Exp $ 14