# I have package hyper ref warning

I have around 25 warning about package hyperref warning: token not allowed in a pdf string removing math shift At each \subsubsection in paper. How to solve it? Can expert help me?

• Show a complete minimal example that demonstrates the problem. – Ulrike Fischer Apr 17 '19 at 8:02

 \subsection{text \texorpdfstring{$\alpha$}{alpha} text}