[Pw_forum] epsilon.x

[T t]

dear pwscf users,
has some of you calculated the dielectric function within pwscf? I am struggling with a pb i haven't managed to fix yet, and i hope you will help me.
According to the document eps_man.pdf, the dielectric function is calculated as a normal postprocessing that uses the executable epsilon.x and gives in output  
a file termed epsr(i).dat. In my case, the epsilon.x runs well but doesn't produce any file in output. is there a problem inside the epsilon.x code? How to make it write the outputs on the working directory? 
many thanks in advance.
Thierry
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