This is METAFONT, Version 2.7182 (Web2C 7.3.1) (base=mf 1999.9.25)  30 APR 2000 22:42
**\mode:=ljfour; mag:=1+0/600; nonstopmode; input gray
(/usr/share/texmf/fonts/source/public/misc/gray.mf
(/usr/share/texmf/fonts/source/public/misc/graycx.mf
! This file is for cx only.
<to be read again>
                  ;
l.4 ...>cx: errmessage "This file is for cx only";
                                                  fi
This error message was generated by an `errmessage'
command, so I can't give any explicit help.
Pretend that you're Miss Marple: Examine all clues,
and deduce the truth by inspired guesses.

(/usr/share/texmf/fonts/source/public/misc/grayf.mf [0] [1] [2] [3] [4]
[5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
[21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35]
[36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50]
[51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65]
[66] [67] [68] [69] [70] [71] [72] [73] [74] [75] [76] [77] [78] [79] [80]
[81] [82] [83] [84] [85] [86] [87] [88] [89] [90] [91] [92] [93] [94] [95]
[96] [97] [98] [99] [100] [101] [102] [103] [104] [105] [106] [107] [108]
[109] [110] [111] [112] [113] [114] [115] [116] [117] [118] [119] [120]
[121] [122] ) ) )
Font metrics written on gray.tfm.
Output written on gray.600gf (123 characters, 13296 bytes).