--- a/OrthancServer/Sources/ServerJobs/MergeStudyJob.h	Tue Jun 22 10:40:28 2021 +0200
+++ b/OrthancServer/Sources/ServerJobs/MergeStudyJob.h	Wed Jun 23 16:23:23 2021 +0200
@@ -47,6 +47,10 @@
 
     void AddSourceStudyInternal(const std::string& study);
 
+    // Make setter methods private to prevent incorrect calls
+    using SetOfInstancesJob::AddParentResource;
+    using SetOfInstancesJob::AddInstance;
+    
   protected:
     virtual bool HandleInstance(const std::string& instance) ORTHANC_OVERRIDE;
 
@@ -62,12 +66,14 @@
       return targetStudy_;
     }
 
-    void AddSource(const std::string& studyOrSeries);
+    void AddSource(const std::string& publicId);
 
     void AddSourceStudy(const std::string& study);
 
     void AddSourceSeries(const std::string& series);
 
+    void AddSourceInstance(const std::string& instance);  // New in Orthanc 1.9.4
+
     void SetOrigin(const DicomInstanceOrigin& origin);
 
     void SetOrigin(const RestApiCall& call);