Having problems with phrasing and ties combined

[Carlos Martinez]

I need to use a phrasing slur and tie the chord

\slashedGrace { e8\downbow } <a, fis'>2~<a fis'>8 <a e'>8--\downbow |%m144

When I tried to add the phrasing slurs it doe snot work


\slashedGrace { e8\downbow } <a, fis’>~2\(<a fis'>8 <a e'>8\)--\downbow |

But I am getting an error

I can’t seem to get what the problem is?

Help is appreciated thanks!