diff --git a/.gitignore b/.gitignore
index 6569057..696c7ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,6 +34,7 @@
 *.synctex.gz
 *.synctex.gz(busy)
 *.pdfsync
+*.xdv
 
 ## Auxiliary and intermediate files from other packages:
 # algorithms
diff --git a/acex.tex b/acex.tex
index a533f02..5ab21f4 100644
--- a/acex.tex
+++ b/acex.tex
@@ -682,6 +682,25 @@ \subsection{Photon Production}
 union energy grid.  Later, this total photon production cross
 section is written into the ACE GPD block in \cword{acelod}.
 
+The ENDF/B-VIII.1 library release is the first version of the ENDF/B library 
+that has evaluations with discrete primary capture photons in MF=6. The 
+primary photons are formatted differently than in the JENDL evaluations -- in
+the JENDL evaluations, the energy listed in MF=6 is the binding energy (as discrete
+primary energies are listed in MF=12). In the ENDF/B-VIII.1 evaluations, the 
+energies listed are the outgoing photon energy. NJOY2016 handles this format
+divergence by checking the library release number. Future releases of the ENDF/B 
+library may fix this discrepancy. For each discrete primary photon (at the first
+incident energy distribution), the following message is displayed:
+
+\begin{description}
+\begin{singlespace}
+
+\item[\cword{message from acelpp---Handling ENDF-8.1 discrete primary gamma }]~\par
+  \texttt{format by converting to JENDL format}
+
+\end{singlespace}
+\end{description}
+
 \paragraph{Photon Production Matrix.}
 The 30-by-20 photon production matrix is computed from input
 multi-group data.  Therefore, it is necessary to execute the
diff --git a/mandtx.tex b/mandtx.tex
index 9b6a193..a9f4085 100644
--- a/mandtx.tex
+++ b/mandtx.tex
@@ -2243,6 +2243,16 @@ \subsection{Test Problem 20}
 are then run to produce the covariances and prepare plots of the
 results.
 
+\subsection{Test Problem 87}
+\label{ssMandT_20}
+\index{testing!Problem 87}
+
+The input file for this case is the ENDF/B-VIII.1 $^{190}$Pt evaluation which has
+discrete primary photons in MF=6, where the energy listed is the outgoing photon energy.
+This cases tests the format discrepancy between ENDF/B-VIII.1 and JENDL releases in 
+the discrete primary photons, which is handled by \hyperlink{sACERhy}{ACER}.
+
+
 
 \subsection{Application of the NJOY System}
 \label{ssMandT_application}
diff --git a/njoy16.pdf b/njoy16.pdf
index 7660ec9..12f87d4 100644
Binary files a/njoy16.pdf and b/njoy16.pdf differ