This is METAFONT, Version 2.718 (Web2C 7.2) (base=mf 1998.10.11)  15 JUL 2000 13:32
**\mode:=ljfour; mag:=magstep(0.5); nonstopmode; input cmtt10
(/usr/share/texmf/fonts/source/public/cm/cmtt10.mf
(/usr/share/texmf/fonts/source/public/cm/cmbase.mf)
(/usr/share/texmf/fonts/source/public/cm/roman.mf
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(/usr/share/texmf/fonts/source/public/cm/romanl.mf [97] [98] [99] [100]
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(/usr/share/texmf/fonts/source/public/cm/greeku.mf [0] [1] [2] [3] [4] [5]
[6] [7] [8] [9] [10]) (/usr/share/texmf/fonts/source/public/cm/romand.mf
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(/usr/share/texmf/fonts/source/public/cm/romspl.mf [16] [17] [25] [26] [27]
[28]) (/usr/share/texmf/fonts/source/public/cm/romspu.mf [29] [30] [31])
(/usr/share/texmf/fonts/source/public/cm/punct.mf [33] [14] [35] [37] [39]
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(/usr/share/texmf/fonts/source/public/cm/accent.mf [18] [19] [20] [21] [22]
[23] [24] [94] [126] [127]) (/usr/share/texmf/fonts/source/public/cm/romsub.mf
! I can't find file `sym'.
l.13 input sym
              ;
Please type another input file name
! Emergency stop.
l.13 input sym
              ;
*** (job aborted, file error in nonstop mode)

Font metrics written on cmtt10.tfm.
Output written on cmtt10.657gf (115 characters, 20164 bytes).