diff --git a/changed_full/420-448/out/basic/tpl/inc/d3usersonline.tpl b/changed_full/420-448/out/basic/tpl/inc/d3usersonline.tpl
index 11b02e2..58b70df 100644
--- a/changed_full/420-448/out/basic/tpl/inc/d3usersonline.tpl
+++ b/changed_full/420-448/out/basic/tpl/inc/d3usersonline.tpl
@@ -19,7 +19,13 @@
             </tr>
             [{foreach from=$aUsersOnline.classes item="aClassUser"}]
                 <tr>
-                    <td>[{$aClassUser->classname|ucfirst}]:</td>
+                    <td>
+                        [{if $aClassUser->classname}]
+                            [{$aClassUser->classname|ucfirst}]:
+                        [{else}]
+                            undefined:
+                        [{/if}]
+                    </td>
                     <td style="text-align: right;">
                         <b>[{$aClassUser->counter}]</b>
                     </td>
diff --git a/changed_full/450/out/azure/tpl/inc/d3usersonline.tpl b/changed_full/450/out/azure/tpl/inc/d3usersonline.tpl
index 6d3e7af..215e0b8 100644
--- a/changed_full/450/out/azure/tpl/inc/d3usersonline.tpl
+++ b/changed_full/450/out/azure/tpl/inc/d3usersonline.tpl
@@ -20,7 +20,13 @@
                 </tr>
                 [{foreach from=$aUsersOnline.classes item="aClassUser"}]
                     <tr>
-                        <td>[{$aClassUser->classname|ucfirst}]:</td>
+                        <td>
+                            [{if $aClassUser->classname}]
+                                [{$aClassUser->classname|ucfirst}]:
+                            [{else}]
+                                undefined:
+                            [{/if}]
+                        </td>
                         <td style="text-align: right;">
                             <b>[{$aClassUser->counter}]</b>
                         </td>
diff --git a/changed_full/450/out/basic/tpl/inc/d3usersonline.tpl b/changed_full/450/out/basic/tpl/inc/d3usersonline.tpl
index 11b02e2..58b70df 100644
--- a/changed_full/450/out/basic/tpl/inc/d3usersonline.tpl
+++ b/changed_full/450/out/basic/tpl/inc/d3usersonline.tpl
@@ -19,7 +19,13 @@
             </tr>
             [{foreach from=$aUsersOnline.classes item="aClassUser"}]
                 <tr>
-                    <td>[{$aClassUser->classname|ucfirst}]:</td>
+                    <td>
+                        [{if $aClassUser->classname}]
+                            [{$aClassUser->classname|ucfirst}]:
+                        [{else}]
+                            undefined:
+                        [{/if}]
+                    </td>
                     <td style="text-align: right;">
                         <b>[{$aClassUser->counter}]</b>
                     </td>
diff --git a/changed_full/451-453/out/azure/tpl/inc/d3usersonline.tpl b/changed_full/451-453/out/azure/tpl/inc/d3usersonline.tpl
index 6d3e7af..215e0b8 100644
--- a/changed_full/451-453/out/azure/tpl/inc/d3usersonline.tpl
+++ b/changed_full/451-453/out/azure/tpl/inc/d3usersonline.tpl
@@ -20,7 +20,13 @@
                 </tr>
                 [{foreach from=$aUsersOnline.classes item="aClassUser"}]
                     <tr>
-                        <td>[{$aClassUser->classname|ucfirst}]:</td>
+                        <td>
+                            [{if $aClassUser->classname}]
+                                [{$aClassUser->classname|ucfirst}]:
+                            [{else}]
+                                undefined:
+                            [{/if}]
+                        </td>
                         <td style="text-align: right;">
                             <b>[{$aClassUser->counter}]</b>
                         </td>
diff --git a/changed_full/451-453/out/basic/tpl/inc/d3usersonline.tpl b/changed_full/451-453/out/basic/tpl/inc/d3usersonline.tpl
index 11b02e2..58b70df 100644
--- a/changed_full/451-453/out/basic/tpl/inc/d3usersonline.tpl
+++ b/changed_full/451-453/out/basic/tpl/inc/d3usersonline.tpl
@@ -19,7 +19,13 @@
             </tr>
             [{foreach from=$aUsersOnline.classes item="aClassUser"}]
                 <tr>
-                    <td>[{$aClassUser->classname|ucfirst}]:</td>
+                    <td>
+                        [{if $aClassUser->classname}]
+                            [{$aClassUser->classname|ucfirst}]:
+                        [{else}]
+                            undefined:
+                        [{/if}]
+                    </td>
                     <td style="text-align: right;">
                         <b>[{$aClassUser->counter}]</b>
                     </td>
diff --git a/setup+doku/Installation.pdf b/setup+doku/Installation.pdf
index 2e590de..afba6a7 100644
Binary files a/setup+doku/Installation.pdf and b/setup+doku/Installation.pdf differ
diff --git a/source/UsersOnline-Installation.docx b/source/UsersOnline-Installation.docx
index bdfa760..f37d40d 100644
Binary files a/source/UsersOnline-Installation.docx and b/source/UsersOnline-Installation.docx differ