diff --git a/Code/Mantid/Framework/ICat/src/CatalogPublish.cpp b/Code/Mantid/Framework/ICat/src/CatalogPublish.cpp
index 52524cfbcca5..4c3b71aee808 100644
--- a/Code/Mantid/Framework/ICat/src/CatalogPublish.cpp
+++ b/Code/Mantid/Framework/ICat/src/CatalogPublish.cpp
@@ -137,8 +137,6 @@ namespace Mantid
       if (boost::lexical_cast<bool>(getPropertyValue("GenerateDOI")))
       {
         int64_t investigationID = getProperty("InvestigationID");
-        if (investigationID == 0) throw std::runtime_error("You must provide a valid investigationID.");
-
         std::string generatedDOI = catalogInfoService->registerDatafileDOI(investigationID);
         g_log.notice("The DOI registered for datafile " + Poco::Path(filePath).getFileName() + " was: " + generatedDOI);
       }
diff --git a/Code/Mantid/Framework/ICat/src/ICat4/ICat4Catalog.cpp b/Code/Mantid/Framework/ICat/src/ICat4/ICat4Catalog.cpp
index cc8cda455ddd..601701032c8e 100644
--- a/Code/Mantid/Framework/ICat/src/ICat4/ICat4Catalog.cpp
+++ b/Code/Mantid/Framework/ICat/src/ICat4/ICat4Catalog.cpp
@@ -391,6 +391,7 @@ namespace Mantid
       if (outputws->getColumnNames().empty())
       {
         // Add rows headers to the output workspace.
+        outputws->addColumn("long64","DatabaseID");
         outputws->addColumn("str","InvestigationID");
         outputws->addColumn("str","Facility");
         outputws->addColumn("str","Title");
@@ -414,6 +415,7 @@ namespace Mantid
           std::string emptyCell("");
 
           // Now add the relevant investigation data to the table (They always exist).
+          savetoTableWorkspace(investigation->id, table);
           savetoTableWorkspace(investigation->name, table);
           savetoTableWorkspace(investigation->facility->name, table);
           savetoTableWorkspace(investigation->title, table);
diff --git a/Code/Mantid/MantidQt/MantidWidgets/src/CatalogSearch.cpp b/Code/Mantid/MantidQt/MantidWidgets/src/CatalogSearch.cpp
index 21523c99a81f..b888a4d3c6c3 100644
--- a/Code/Mantid/MantidQt/MantidWidgets/src/CatalogSearch.cpp
+++ b/Code/Mantid/MantidQt/MantidWidgets/src/CatalogSearch.cpp
@@ -752,6 +752,7 @@ namespace MantidQt
 
       // Show only a portion of the title as they can be quite long.
       resultsTable->setColumnWidth(headerIndexByName(resultsTable, "Title"), 210);
+      resultsTable->setColumnHidden(headerIndexByName(resultsTable, "DatabaseID"),true);
       resultsTable->setColumnHidden(headerIndexByName(resultsTable, "SessionID"), true);
 
       // Sort by endDate with the most recent being first.