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@@ -1380,6 +1380,18 @@ exactly the same cost as any other 6-point--molecule interpolation.
The current implementation has all the framework for smoothing, but
only the \verb|smoothing=0| case is implemented at the moment.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{Debugging}
+
+Setting the optional parameter
+\begin{verbatim}
+const CCTK_INT debug;
+\end{verbatim}
+to a positive value turns on various debug printing inside the
+interpolator. This is likely only for debugging the interpolator;
+you need to look at the interpolator source code to interpret the output.
+
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Supressing Interpolation}