reinitializing lex scanner

[Vlad Panait]

Hi,

i would like to run a lex scanner several times. If i don't get any 
parce errors from the grammar, all is fine.
If there is an error, in the yyerror i print a message and stop.
Then if i try to run the scanner on another file, it seems it buffered 
the info from the previous file, and continues from the wrong place.
I've checked the yy_delete_buffer function in flex, and tried to use it, 
but it cannot find it at compile time.

Any suggestions?
Best regards,
Vlad