B.2.1 Yapp_mongo

Valid devices in yapp_mongo are (see also MONGO-87^B.5users manual) numbers 1..6, -6..-1:

1.  Retrographics 640    -1.  Versatec (portrait)
2.  DEC VT125            -2.  Versatec (landscape)
3.  Tektronix 4010       -3.  Printronix (portrait)
4.  Grinell 270          -4.  Printronix (landscape)
5.  HP 2648A             -5.  Postscript (portrait)
6.  Sun Windows          -6.  Postscript (landscape)
                         -7.  Postscript (square portrait) ***

Make sure you have set:

    setenv MONGOPATH /usr/local/lib/mongo
    setenv MONGOFILES $MONGOPATH/mongofiles.dat

or appropriate private ones, or use whatever your system manager has provided for.