immmettendo in flex un semplice sorgente mi da questo listato di errori...

"f.flex", line 7: bad character: {
"f.flex", line 7: unknown error processing section 1
"f.flex", line 7: unknown error processing section 1
"f.flex", line 7: bad character: }
"f.flex", line 7: bad character: +
"f.flex", line 7: bad character: {
"f.flex", line 14: bad character: {
"f.flex", line 14: unknown error processing section 1
"f.flex", line 14: bad character: }
"f.flex", line 14: bad character: +
"f.flex", line 14: bad character: "
"f.flex", line 14: bad character: .
"f.flex", line 14: bad character: "
"f.flex", line 14: bad character: {
"f.flex", line 14: unknown error processing section 1
"f.flex", line 14: bad character: }
"f.flex", line 14: bad character: *
"f.flex", line 14: bad character: {
"f.flex", line 27: bad character: {
"f.flex", line 27: unknown error processing section 1
"f.flex", line 27: bad character: }
"f.flex", line 27: unknown error processing section 1
"f.flex", line 27: bad character: (
"f.flex", line 27: bad character: "
"f.flex", line 27: unknown error processing section 1
"f.flex", line 27: bad character: :
"f.flex", line 27: bad character: %
"f.flex", line 27: unknown error processing section 1
"f.flex", line 27: bad character: \
"f.flex", line 27: unknown error processing section 1
"f.flex", line 27: bad character: "
"f.flex", line 27: bad character: ,
"f.flex", line 27: unknown error processing section 1
"f.flex", line 27: bad character: )
"f.flex", line 27: bad character: ;
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: +
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: |
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: -
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: |
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: *
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: |
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: /
"f.flex", line 31: bad character: "
"f.flex", line 31: unknown error processing section 1
"f.flex", line 31: bad character: (
"f.flex", line 31: bad character: "
"f.flex", line 31: unknown error processing section 1
"f.flex", line 31: bad character: :
"f.flex", line 31: bad character: %
"f.flex", line 31: unknown error processing section 1
"f.flex", line 31: bad character: \
"f.flex", line 31: unknown error processing section 1
"f.flex", line 31: bad character: "
"f.flex", line 31: bad character: ,
"f.flex", line 31: unknown error processing section 1
"f.flex", line 31: bad character: )
"f.flex", line 31: bad character: ;
"f.flex", line 35: bad character: "
"f.flex", line 35: bad character: {
"f.flex", line 35: bad character: "
"f.flex", line 35: bad character: [
"f.flex", line 35: bad character: ^
"f.flex", line 35: bad character: }
"f.flex", line 35: bad character: \
"f.flex", line 35: unknown error processing section 1
"f.flex", line 35: bad character: ]
"f.flex", line 35: bad character: *
"f.flex", line 35: bad character: "
"f.flex", line 35: bad character: }
"f.flex", line 35: bad character: "
"f.flex", line 35: bad character: /
"f.flex", line 35: bad character: *
"f.flex", line 35: unknown error processing section 1
"f.flex", line 35: unknown error processing section 1
"f.flex", line 35: unknown error processing section 1
"f.flex", line 35: bad character: *
"f.flex", line 35: bad character: /
"f.flex", line 39: bad character: [
"f.flex", line 39: bad character: \
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: bad character: \
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: bad character: ]
"f.flex", line 39: bad character: +
"f.flex", line 39: bad character: /
"f.flex", line 39: bad character: *
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: unknown error processing section 1
"f.flex", line 39: bad character: *
"f.flex", line 39: bad character: /
"f.flex", line 43: bad character: .
"f.flex", line 43: unknown error processing section 1
"f.flex", line 43: bad character: (
"f.flex", line 43: bad character: "
"f.flex", line 43: unknown error processing section 1
"f.flex", line 43: unknown error processing section 1
"f.flex", line 43: bad character: :
"f.flex", line 43: bad character: %
"f.flex", line 43: unknown error processing section 1
"f.flex", line 43: bad character: \
"f.flex", line 43: unknown error processing section 1
"f.flex", line 43: bad character: "
"f.flex", line 43: bad character: ,
"f.flex", line 43: unknown error processing section 1
"f.flex", line 43: bad character: )
"f.flex", line 43: bad character: ;
"f.flex", line 60: unrecognized rule
"f.flex", line 60: unrecognized rule
"f.flex", line 60: unrecognized rule
"f.flex", line 61: unrecognized rule
"f.flex", line 61: unrecognized rule