diff --git a/_modules/index.html b/_modules/index.html
index 7aef849..2654b08 100644
--- a/_modules/index.html
+++ b/_modules/index.html
@@ -8,7 +8,7 @@
   
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   
-  <title>Overview: module code &mdash; parsedmarc 3.8.0 documentation</title>
+  <title>Overview: module code &mdash; parsedmarc 3.8.1 documentation</title>
   
 
   
@@ -56,7 +56,7 @@
             
             
               <div class="version">
-                3.8.0
+                3.8.1
               </div>
             
           
@@ -177,7 +177,7 @@
     <script type="text/javascript">
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'../',
-            VERSION:'3.8.0',
+            VERSION:'3.8.1',
             LANGUAGE:'None',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',
diff --git a/_modules/parsedmarc.html b/_modules/parsedmarc.html
index 547aba7..3a8ef23 100644
--- a/_modules/parsedmarc.html
+++ b/_modules/parsedmarc.html
@@ -8,7 +8,7 @@
   
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   
-  <title>parsedmarc &mdash; parsedmarc 3.8.0 documentation</title>
+  <title>parsedmarc &mdash; parsedmarc 3.8.1 documentation</title>
   
 
   
@@ -56,7 +56,7 @@
             
             
               <div class="version">
-                3.8.0
+                3.8.1
               </div>
             
           
@@ -188,7 +188,7 @@
 <span class="kn">import</span> <span class="nn">dateparser</span>
 <span class="kn">import</span> <span class="nn">mailparser</span>
 
-<span class="n">__version__</span> <span class="o">=</span> <span class="s2">&quot;3.8.0&quot;</span>
+<span class="n">__version__</span> <span class="o">=</span> <span class="s2">&quot;3.8.1&quot;</span>
 
 <span class="n">logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="vm">__name__</span><span class="p">)</span>
 <span class="n">logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">INFO</span><span class="p">)</span>
@@ -1078,7 +1078,7 @@
             <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">eml_path</span><span class="p">,</span> <span class="s2">&quot;rb&quot;</span><span class="p">)</span> <span class="k">as</span> <span class="n">eml_file</span><span class="p">:</span>
                 <span class="n">rfc822</span> <span class="o">=</span> <span class="n">eml_file</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
         <span class="k">except</span> <span class="ne">FileNotFoundError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
-            <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span>
+            <span class="k">raise</span> <span class="ne">FileNotFoundError</span><span class="p">(</span>
                 <span class="s2">&quot;Error running msgconvert. Please ensure it is installed</span><span class="se">\n</span><span class="s2">&quot;</span>
                 <span class="s2">&quot;sudo apt install libemail-outlook-message-perl</span><span class="se">\n</span><span class="s2">&quot;</span>
                 <span class="s2">&quot;https://github.com/mvz/email-outlook-message-perl</span><span class="se">\n\n</span><span class="s2">&quot;</span>
@@ -1162,6 +1162,11 @@
         <span class="k">except</span> <span class="p">(</span><span class="ne">TypeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">,</span> <span class="n">binascii</span><span class="o">.</span><span class="n">Error</span><span class="p">):</span>
             <span class="k">pass</span>
 
+        <span class="k">except</span> <span class="ne">FileNotFoundError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
+            <span class="n">error</span> <span class="o">=</span> <span class="s1">&#39;Unable to parse message with subject &quot;</span><span class="si">{0}</span><span class="s1">&quot;: </span><span class="si">{1}</span><span class="s1">&#39;</span> <span class="o">.</span><span class="n">format</span><span class="p">(</span>
+                <span class="n">subject</span><span class="p">,</span> <span class="n">e</span><span class="p">)</span>
+            <span class="k">raise</span> <span class="n">InvalidDMARCReport</span><span class="p">(</span><span class="n">error</span><span class="p">)</span>
+
     <span class="k">if</span> <span class="n">result</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
         <span class="n">error</span> <span class="o">=</span> <span class="s1">&#39;Message with subject &quot;</span><span class="si">{0}</span><span class="s1">&quot; is &#39;</span> \
                 <span class="s1">&#39;not a valid DMARC report&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">subject</span><span class="p">)</span>
@@ -1650,7 +1655,7 @@
     <script type="text/javascript">
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'../',
-            VERSION:'3.8.0',
+            VERSION:'3.8.1',
             LANGUAGE:'None',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',
diff --git a/_modules/parsedmarc/elastic.html b/_modules/parsedmarc/elastic.html
index 5ba2eb9..f2af938 100644
--- a/_modules/parsedmarc/elastic.html
+++ b/_modules/parsedmarc/elastic.html
@@ -8,7 +8,7 @@
   
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   
-  <title>parsedmarc.elastic &mdash; parsedmarc 3.8.0 documentation</title>
+  <title>parsedmarc.elastic &mdash; parsedmarc 3.8.1 documentation</title>
   
 
   
@@ -56,7 +56,7 @@
             
             
               <div class="version">
-                3.8.0
+                3.8.1
               </div>
             
           
@@ -546,7 +546,7 @@
     <script type="text/javascript">
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'../../',
-            VERSION:'3.8.0',
+            VERSION:'3.8.1',
             LANGUAGE:'None',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',
diff --git a/_static/documentation_options.js b/_static/documentation_options.js
index a3b63f9..636fbce 100644
--- a/_static/documentation_options.js
+++ b/_static/documentation_options.js
@@ -1,6 +1,6 @@
 var DOCUMENTATION_OPTIONS = {
     URL_ROOT: document.getElementById("documentation_options").getAttribute('data-url_root'),
-    VERSION: '3.8.0',
+    VERSION: '3.8.1',
     LANGUAGE: 'None',
     COLLAPSE_INDEX: false,
     FILE_SUFFIX: '.html',
diff --git a/genindex.html b/genindex.html
index cfe1eae..6d49c85 100644
--- a/genindex.html
+++ b/genindex.html
@@ -9,7 +9,7 @@
   
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   
-  <title>Index &mdash; parsedmarc 3.8.0 documentation</title>
+  <title>Index &mdash; parsedmarc 3.8.1 documentation</title>
   
 
   
@@ -57,7 +57,7 @@
             
             
               <div class="version">
-                3.8.0
+                3.8.1
               </div>
             
           
@@ -310,7 +310,7 @@
     <script type="text/javascript">
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'./',
-            VERSION:'3.8.0',
+            VERSION:'3.8.1',
             LANGUAGE:'None',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',
diff --git a/index.html b/index.html
index 8079b6f..53a5ffc 100644
--- a/index.html
+++ b/index.html
@@ -8,7 +8,7 @@
   
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   
-  <title>parsedmarc documentation - Open source DMARC report analyzer and visualizer &mdash; parsedmarc 3.8.0 documentation</title>
+  <title>parsedmarc documentation - Open source DMARC report analyzer and visualizer &mdash; parsedmarc 3.8.1 documentation</title>
   
 
   
@@ -56,7 +56,7 @@
             
             
               <div class="version">
-                3.8.0
+                3.8.1
               </div>
             
           
@@ -1297,7 +1297,7 @@ to a callback function</p>
     <script type="text/javascript">
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'./',
-            VERSION:'3.8.0',
+            VERSION:'3.8.1',
             LANGUAGE:'None',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',
diff --git a/objects.inv b/objects.inv
index 490ec1b..a866826 100644
Binary files a/objects.inv and b/objects.inv differ
diff --git a/py-modindex.html b/py-modindex.html
index 06e5a66..0482f77 100644
--- a/py-modindex.html
+++ b/py-modindex.html
@@ -8,7 +8,7 @@
   
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   
-  <title>Python Module Index &mdash; parsedmarc 3.8.0 documentation</title>
+  <title>Python Module Index &mdash; parsedmarc 3.8.1 documentation</title>
   
 
   
@@ -59,7 +59,7 @@
             
             
               <div class="version">
-                3.8.0
+                3.8.1
               </div>
             
           
@@ -200,7 +200,7 @@
     <script type="text/javascript">
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'./',
-            VERSION:'3.8.0',
+            VERSION:'3.8.1',
             LANGUAGE:'None',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',
diff --git a/search.html b/search.html
index 911ef49..47497a8 100644
--- a/search.html
+++ b/search.html
@@ -8,7 +8,7 @@
   
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   
-  <title>Search &mdash; parsedmarc 3.8.0 documentation</title>
+  <title>Search &mdash; parsedmarc 3.8.1 documentation</title>
   
 
   
@@ -56,7 +56,7 @@
             
             
               <div class="version">
-                3.8.0
+                3.8.1
               </div>
             
           
@@ -188,7 +188,7 @@
     <script type="text/javascript">
         var DOCUMENTATION_OPTIONS = {
             URL_ROOT:'./',
-            VERSION:'3.8.0',
+            VERSION:'3.8.1',
             LANGUAGE:'None',
             COLLAPSE_INDEX:false,
             FILE_SUFFIX:'.html',