--- a/Framework/Orthanc/Plugins/Samples/Common/OrthancPluginCppWrapper.cpp	Mon Oct 24 09:09:13 2016 +0200
+++ b/Framework/Orthanc/Plugins/Samples/Common/OrthancPluginCppWrapper.cpp	Wed Oct 26 13:34:49 2016 +0200
@@ -906,5 +906,97 @@
       throw PluginException(error);
     }
   }
+
+
+  static void ReportIncompatibleVersion(OrthancPluginContext* context,
+                                        unsigned int major,
+                                        unsigned int minor,
+                                        unsigned int revision)
+  {
+    char buf[128];
+    sprintf(buf, "Your version of the Orthanc core (%s) is too old to run this plugin (%d.%d.%d is required)",
+            context->orthancVersion, major, minor, revision);
+    OrthancPluginLogError(context, buf);
+  }
+
+
+  bool CheckMinimalOrthancVersion(OrthancPluginContext* context,
+                                  unsigned int major,
+                                  unsigned int minor,
+                                  unsigned int revision)
+  {
+    if (context == NULL)
+    {
+      OrthancPluginLogError(context, "Bad Orthanc context in the plugin");      
+      return false;
+    }
+
+    if (!strcmp(context->orthancVersion, "mainline"))
+    {
+      // Assume compatibility with the mainline
+      return true;
+    }
+
+    // Parse the version of the Orthanc core
+    int aa, bb, cc;
+    if ( 
+#ifdef _MSC_VER
+      sscanf_s
+#else
+      sscanf
+#endif
+      (context->orthancVersion, "%4d.%4d.%4d", &aa, &bb, &cc) != 3 ||
+      aa < 0 ||
+      bb < 0 ||
+      cc < 0)
+    {
+      throw false;
+    }
+
+    unsigned int a = static_cast<unsigned int>(aa);
+    unsigned int b = static_cast<unsigned int>(bb);
+    unsigned int c = static_cast<unsigned int>(cc);
+
+    // Check the major version number
+
+    if (a > major)
+    {
+      return true;
+    }
+
+    if (a < major)
+    {
+      ReportIncompatibleVersion(context, major, minor, revision);
+      return false;
+    }
+
+
+    // Check the minor version number
+    assert(a == major);
+
+    if (b > minor)
+    {
+      return true;
+    }
+
+    if (b < minor)
+    {
+      ReportIncompatibleVersion(context, major, minor, revision);
+      return false;
+    }
+
+    // Check the patch level version number
+    assert(a == major && b == minor);
+
+    if (c >= revision)
+    {
+      return true;
+    }
+    else
+    {
+      ReportIncompatibleVersion(context, major, minor, revision);
+      return false;
+    }
+  }
 }
 

--- a/Framework/Orthanc/Plugins/Samples/Common/OrthancPluginCppWrapper.h	Mon Oct 24 09:09:13 2016 +0200
+++ b/Framework/Orthanc/Plugins/Samples/Common/OrthancPluginCppWrapper.h	Wed Oct 26 13:34:49 2016 +0200
@@ -388,6 +388,11 @@
     }
   }
 
+  bool CheckMinimalOrthancVersion(OrthancPluginContext* context,
+                                  unsigned int major,
+                                  unsigned int minor,
+                                  unsigned int revision);
+
 
   namespace Internals
   {

--- a/ViewerPlugin/CMakeLists.txt	Mon Oct 24 09:09:13 2016 +0200
+++ b/ViewerPlugin/CMakeLists.txt	Wed Oct 26 13:34:49 2016 +0200
@@ -177,6 +177,7 @@
   ${ORTHANC_ROOT}/Core/Logging.cpp
   ${ORTHANC_ROOT}/Core/MultiThreading/Semaphore.cpp
   ${ORTHANC_ROOT}/Core/Toolbox.cpp
+  ${ORTHANC_ROOT}/Plugins/Samples/Common/OrthancPluginCppWrapper.cpp
 
   ${AUTOGENERATED_SOURCES}
 

--- a/ViewerPlugin/Plugin.cpp	Mon Oct 24 09:09:13 2016 +0200
+++ b/ViewerPlugin/Plugin.cpp	Wed Oct 26 13:34:49 2016 +0200
@@ -330,6 +330,12 @@
       return -1;
     }
 
+    if (!OrthancPlugins::CheckMinimalOrthancVersion(context_, 1, 1, 0))
+    {
+      // We need the "/instances/.../frames/.../raw" URI that was introduced in Orthanc 1.1.0
+      return -1;
+    }
+
     // Limit the number of PNG transcoders to the number of available
     // hardware threads (e.g. number of CPUs or cores or
     // hyperthreading units)