accidentals in cadenzas

[Victor Eijkhout]

I'm writing a cadenza, and it seems that < \bar "" > does not have  
the effect of accidentals being reset as if there was a real bar  
line. For instance

d16 [e fis g a b cis d e f e d]
\bar ""
e,16 [fis gis a b cis d e f g f e]

In the second phrase, only a sharp will be printed for the gis, not  
for the fis.

Is there any way to get the effect that at the invislble bar line all  
previous accidentals are forgotten/reset?

Victor.