fbnf.m:214: In clause for predicate `execute'/7:
fbnf.m:214:   in argument 1 (i.e. the predicate term) of higher-order predicate
fbnf.m:214:   call:
fbnf.m:214:   type error: variable `Entry' has type
fbnf.m:214:     pred(
fbnf.m:214:       fbnf.fstate :: in,
fbnf.m:214:       fbnf.fstate :: out,
fbnf.m:214:       io.state :: di,
fbnf.m:214:       io.state :: uo,
fbnf.m:214:       list.list(string) :: in,
fbnf.m:214:       list.list(string) :: out
fbnf.m:214:     ) is det;
fbnf.m:214:   expected type was
fbnf.m:214:     pred(V_7, V_8, V_9, V_10).
fbnf.m:214:   Arity mismatch for the predicate: expected four arguments, got
fbnf.m:214:   six.
For more information, recompile with `-E'.