--- a/CMakeLists.txt	Tue Apr 14 10:14:52 2026 +0200
+++ b/CMakeLists.txt	Tue Apr 14 14:32:44 2026 +0200
@@ -26,7 +26,7 @@
   set(ORTHANC_FRAMEWORK_VERSION "mainline")
   set(ORTHANC_FRAMEWORK_DEFAULT_SOURCE "hg")
 else()
-  set(ORTHANC_FRAMEWORK_VERSION "94c7f3784456")  # while waiting for 1.12.11 (for SetCurrentThreadName fix)
+  set(ORTHANC_FRAMEWORK_VERSION "1.12.11")
   set(ORTHANC_FRAMEWORK_DEFAULT_SOURCE "web")
 endif()
 

--- a/Resources/Orthanc/CMake/DownloadOrthancFramework.cmake	Tue Apr 14 10:14:52 2026 +0200
+++ b/Resources/Orthanc/CMake/DownloadOrthancFramework.cmake	Tue Apr 14 14:32:44 2026 +0200
@@ -177,6 +177,8 @@
         set(ORTHANC_FRAMEWORK_MD5 "66b5a2ee60706c4a502896083b9e1a01")
       elseif (ORTHANC_FRAMEWORK_VERSION STREQUAL "1.12.10")
         set(ORTHANC_FRAMEWORK_MD5 "d5e1ba442104c89a24013cb859a9d6bf")
+      elseif (ORTHANC_FRAMEWORK_VERSION STREQUAL "1.12.11")
+        set(ORTHANC_FRAMEWORK_MD5 "389b273b64b513ba8fc3233f34201cc1")
 
       # Below this point are development snapshots that were used to
       # release some plugin, before an official release of the Orthanc
@@ -231,6 +233,11 @@
         # for BlockingSharedMessageQueue.WaitEmpty()
         set(ORTHANC_FRAMEWORK_PRE_RELEASE ON)
         set(ORTHANC_FRAMEWORK_MD5 "c037cd2ddbe1b65b431692855483161b")
+      elseif (ORTHANC_FRAMEWORK_VERSION STREQUAL "56eb61c86f93")
+        # OE2 1.11.0 (framework post-1.12.10)
+        # for HttpClient that returns the answer body in case of HTTP error
+        set(ORTHANC_FRAMEWORK_PRE_RELEASE ON)
+        set(ORTHANC_FRAMEWORK_MD5 "665f8aa70d7c5091bc20da37cf664910")
       endif()
     endif()
   endif()

--- a/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.cpp	Tue Apr 14 10:14:52 2026 +0200
+++ b/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.cpp	Tue Apr 14 14:32:44 2026 +0200
@@ -1544,11 +1544,25 @@
 
 #endif /* HAS_ORTHANC_PLUGIN_FIND_MATCHER == 1 */
 
+  static void CheckAnswerSizeIsLessThan4GB(const std::string& answer)
+  {
+    if (answer.size() > static_cast<size_t>(std::numeric_limits<uint32_t>::max()))
+    {
+  #if HAS_ORTHANC_EXCEPTION == 1
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, "Cannot send HTTP response larger than 4GB");
+  #else
+      ORTHANC_PLUGINS_LOG_ERROR("Cannot send HTTP response larger than 4GB");
+      ORTHANC_PLUGINS_THROW_PLUGIN_ERROR_CODE(OrthancPluginErrorCode_ParameterOutOfRange);          
+  #endif
+    }
+  }
+
   void AnswerJson(const Json::Value& value,
                   OrthancPluginRestOutput* output)
   {
     std::string bodyString;
-    WriteStyledJson(bodyString, value);    
+    WriteStyledJson(bodyString, value);
+    CheckAnswerSizeIsLessThan4GB(bodyString);    
     OrthancPluginAnswerBuffer(GetGlobalContext(), output, bodyString.c_str(), bodyString.size(), "application/json");
   }
 
@@ -1556,6 +1570,7 @@
                     const char* mimeType,
                     OrthancPluginRestOutput* output)
   {
+    CheckAnswerSizeIsLessThan4GB(answer);
     OrthancPluginAnswerBuffer(GetGlobalContext(), output, answer.c_str(), answer.size(), mimeType);
   }
 
@@ -1564,6 +1579,26 @@
     OrthancPluginSendHttpStatusCode(GetGlobalContext(), output, httpError);
   }
 
+  void AnswerHttpError(uint16_t httpError,
+                       OrthancPluginRestOutput* output,
+                       const std::string& answer,
+                       const char* mimeType)
+  {
+    CheckAnswerSizeIsLessThan4GB(answer);
+
+    OrthancPluginSetHttpHeader(GetGlobalContext(),
+                               output,
+                               "content-type",
+                               mimeType);
+                               
+    OrthancPluginSendHttpStatus(GetGlobalContext(),
+                                output,
+                                httpError,
+                                answer.c_str(),
+                                static_cast<uint32_t>(answer.size()));
+  }
+
+
   void AnswerMethodNotAllowed(OrthancPluginRestOutput *output, const char* allowedMethods)
   {
     OrthancPluginSendMethodNotAllowed(GetGlobalContext(), output, allowedMethods);

--- a/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h	Tue Apr 14 10:14:52 2026 +0200
+++ b/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h	Tue Apr 14 14:32:44 2026 +0200
@@ -27,7 +27,6 @@
 
 #include <orthanc/OrthancCPlugin.h>
 #include <boost/noncopyable.hpp>
-#include <boost/lexical_cast.hpp>
 #include <boost/thread/mutex.hpp>
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <json/value.h>
@@ -690,6 +689,11 @@
   void AnswerHttpError(uint16_t httpError,
                        OrthancPluginRestOutput* output);
 
+  void AnswerHttpError(uint16_t httpError,
+                       OrthancPluginRestOutput* output,
+                       const std::string& answer,
+                       const char* mimeType);
+
   void AnswerMethodNotAllowed(OrthancPluginRestOutput* output, const char* allowedMethods);
 
 #if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 5, 0)
@@ -1025,7 +1029,20 @@
     OrthancPluginSetMetricsValue(GetGlobalContext(), name,
                                  value, OrthancPluginMetricsType_Default);
   }
+#endif
 
+
+#if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 12, 1)
+  inline void SetMetricsValue(const char* name,
+                              int64_t value)
+  {
+    OrthancPluginSetMetricsIntegerValue(GetGlobalContext(), name,
+                                        value, OrthancPluginMetricsType_Default);
+  }
+#endif
+
+
+#if HAS_ORTHANC_PLUGIN_METRICS == 1
   class MetricsTimer : public boost::noncopyable
   {
   private: