This file is called fferr.dat and contains (i4) err number
and (a80) error message.  The first two lines are skipped.
  1 ffca0:  error: minimum value complex logarithm gives problem, change mu.
  2 ffxa0:  error: minimum value real logarithm gives problem, change mu.
  3 ffcb0:  error: minimum value complex logarithm gives problem, change mu.
  4 ffxb0:  error: minimum value real logarithm gives problem, change mu.
  5 ffcb0p: error: cannot handle complex k^2 yet
  6 ffcb0p: error: minimum value complex log gives problem in unequal masses.
  7 ffxb0p: error: divergence for k->0, m1=m2=0.
  8 ffxb0p: error: minimum value real log gives problem in equal masses.
  9 ffxb0p: error: minimum value real log gives problem in unequal masses.
 10 ffcc0p: error: cannot handle two spacelike momenta and one zero.
 11 ffxc0p: error: cannot handle two spacelike momenta and one zero.
 12 ffcs3:  error: illegal code for isoort(1) (should not occur)
 13 ffcs3:  error: illegal code for isoort(2) (should not occur)
 14 ffcs3:  error: imaginary part wrong, will be improved later
 15 ffcs3:  error: isoort = -1,0 not yet ready
 16 ffcs3:  error: illegal combination in isoort (should not occur)
 17 ffcxs3: error: illegal code for isoort(1) (should not occur)
 18 ffcxs3: error: illegal code for isoort(2) (should not occur)
 19 ffcs4:  error: imaginary part is wrong (should be updated)
 20 ffdcrr: error: Taylor expansion in 1/x not yet ready
 21 ffdcxr: error: imaginary part is wrong
 22 ffdcxr: error: Taylor expansion in 1/x not yet ready
 23 ffcrr:  error: minimum value complex log causes correction term to be wrong.
 24 ffcxr:  error: minimum value real log causes correction term to be wrong.
 25 ffcrr:  error: illegal code for iclas1 (should not occur)
 26 ffcxr:  error: illegal code for iclas1 (should not occur)
 27 ffcrr:  error: illegal code for iclas2 (should not occur)
 28 ffcxr:  error: illegal code for iclas2 (should not occur)
 29 ffxli2: error: argument too large (should not occur)
 30 ffzli2: error: argument too large (should not occur)
 31 ffzzdl: error: imaginary part dilog is undefined for real x > 1.
 32 nffeta: error: eta is not defined for real negative numbers a,b, ab.
 33 nffet1: error: eta is not defined for real negative numbers a,b, ab.
 34 ffcota: error: illegal flag (should not occur)
 35 ffrota: error: illegal flag (should not occur)
 36 ffccyz: error: I took the wrong value for calpha... (should not occur)
 37 ffxxyz: error: I took the wrong value for alpha... (should not occur)
 38 ffcoot: error: a=0, trying to find two roots of a linear equation ...
 39 ffroot: error: a=0, trying to find two roots of a linear equation ...
 40 ffrot3: error: all three external masses zero !
 41 ffxc0:  error: lambda(p1,p2,p3) < 0, unphysical configuration
 42 ffxc0:  error: cannot handle this case (p1,p2,p3 dependent, on threshold)
 43 ffcxs3: error: illegal code for isoort(1) (should not occur)
 44 ffxd0:  error: lambda(p1,p2,p3,p4) < 0, unphysical configuration
 45 ffxd0:  error: cannot handle this case (p1,p2,p3 dependent, on threshold)
 46 ffxd0p: error: correction terms for Ai <0 infinite (mass zero?)
 47 ffcxyz: error: p_i^2 = 0 (should not occur)
 48 ffeta:  error: answer not consistent with normal result (old)
 49 ffcc0:  error: cannot handle complex external momenta or im > 0
 50 ffcd0:  error: cannot handle complex external momenta.
 51 zfflog: error: imaginary part undefined for real z < 0.
 52 zxfflg: error: imaginary part undefined for x < 0.
 53 ffcs3:  error: eta changes within (0,1), add sophisticated terms...
 54 ffrot4: error: cannot find any physical vertex to apply transformation.
 55 fftra0: error: too many vectors parallel, p_1.p_7 or p_2.p_7 is zero.
 56 zfflog: error: tiny imaginary part in conflict with ieps prescription.
 57 ffxe0:  error: lambda(p1,p2,p3,p4,p5) < 0, unphysical
 58 ffxc0j: error: IR divergent C0 with lambda(p1,p2,p3)=0.
 59 ffxc0i: error: IR divergent C0 with delta=0. specify cutoff delta in /ffcut/
 60 ffxc0j: error: IR divergent C0 obtained from D0 is singular. Contact author.
 61 ffxd0p: error: IR divergent D0 with delta=0. specify cutoff delta in /ffcut/
 62 ffxc0p: error: I never expected complex roots in an IR divergent diagram.
 63 ffxd0p: error: can only handle one IR divergence per 3point function
 64 ffxd0p: error: can not handle a threshold in (3,4), rotated wrongly.
 65 ffcxr:  error: IR divergence but iclass!=3.  should not occur.
 66 ffcxs3: error: different imaginary signs should not occur for ipole=3.
 67 ffxdbd: error: I cannot use this algorithm for a linear IR divergence
 68 ffxd0:  error: cannot find a proj. transformation; try another permutation.
 69 ff5ind: error: could not find independent momenta (should not occur).
 70 ffxdna: error: lambda(pi,pj,pk) < 0, unphysical configuration
 71 ffxdna: error: cannot handle lambda(pi,pj,pk) = 0, dependent momenta.
 72 ffxd0e: error: could not find a stable root; please try another permutation
 73 ffxdir: error: cannot handle a linearly divergent four point function (yet)
 74 ffxdbd: error: IR divergent B0' without cutoff delta in /ffcut/
 75 ffdcxr: error: dyz=0, should not occur
 76 ffdcrr: error: cdwz=0, but iepsz!=iepsz and significant
 77 ffdcrr: error: cdyz=0, should not occur
 78 ffdcc0: error: imaginary part wrong
 79 ffdcs:  error: error: cannot handle isoort=0
 80 ffdcs:  error: mixed up iep's, 2*pi^2 wrong somewhere
 81 ffdcs:  error: wrong value for isoort
 82 ffdxc0: error: imaginary part Ai<0 terms uncertain
 83 ffxc0j: error: sorry, complex roots not yet supported here
 84 ffxc0p: error: imaginary part Ai<0 terms uncertain
 85 ffxd0a: error: t3=t4, donot know what to do
 86 ffxdbp: error: cannot compute derivative, lam=0
 87 ffxdi:  error: dependent momenta not yet supported (boundary of phase space)
 88 ffxxyz: error: xk = 0 not yet implemented
 89 aaxi3:  error: cannot invert matrix with zero determinant.
 90 aaxi4:  error: cannot invert matrix with zero determinant.
 91 aaxi5:  error: cannot invert matrix with zero determinant.
 92 ffxc1:  error: cannot invert matrix with zero determinant.
 93 ffze0:  error: Im(m^2) > 0
 94 ffze0:  error: Im(p^2) != 0
 95 ffzf0:  error: Im(m^2) > 0
 96 ffzf0:  error: Im(p^2) != 0
 97 ffxc0j: error: ill-defined IR-divergent C0 for massless charged particles.
 98 ffxdbd: error: ill-defined IR-divergent D0 for massless charged particles.
 100 ffrcvr: math error: probably underflow, I do not know where or how severe..