diff --git a/doc/Changelog.md b/doc/Changelog.md
index 6aec8b0..56a2092 100644
--- a/doc/Changelog.md
+++ b/doc/Changelog.md
@@ -1,4 +1,7 @@
 
+## 0.1.2
+- Tweaks to merge command and merged-xml output
+
 ## 0.1.1
 - Tweaks to text reporting
 
diff --git a/setup.py b/setup.py
index 67e37a7..2c1b58d 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 import os
 from setuptools import setup, find_namespace_packages
 
-version="0.1.1"
+version="0.1.2"
 
 if "BUILD_NUM" in os.environ.keys():
     version = version + "." + os.environ["BUILD_NUM"]
diff --git a/src/ucis/__main__.py b/src/ucis/__main__.py
index 984d371..a87ca6a 100644
--- a/src/ucis/__main__.py
+++ b/src/ucis/__main__.py
@@ -44,7 +44,7 @@ def get_parser():
         help="Specifies the format of the input databases. Defaults to 'xml'")
     merge.add_argument("--libucis", "-l",
         help="Specifies the name/path of the UCIS shared library")
-    merge.add_argument("db", action="append")
+    merge.add_argument("db", nargs="+")
     merge.set_defaults(func=cmd_merge.merge)
     
     list_db_formats = subparser.add_parser("list-db-formats",
diff --git a/src/ucis/cmd/cmd_merge.py b/src/ucis/cmd/cmd_merge.py
index a8a48c5..5504d16 100644
--- a/src/ucis/cmd/cmd_merge.py
+++ b/src/ucis/cmd/cmd_merge.py
@@ -50,4 +50,4 @@ def merge(args):
     for db in db_l:
         db.close()
 
-    
\ No newline at end of file
+    
diff --git a/src/ucis/xml/xml_writer.py b/src/ucis/xml/xml_writer.py
index 4c3d3df..2877abb 100644
--- a/src/ucis/xml/xml_writer.py
+++ b/src/ucis/xml/xml_writer.py
@@ -98,9 +98,11 @@ def write_history_nodes(self):
         
 #        histNodes = self.root.SubElement(self.root, "historyNodes")
 
+        have_hist_nodes = False
         for i,h in enumerate(self.db.getHistoryNodes(HistoryNodeKind.ALL)):
             histN = self.mkElem(self.root, "historyNodes")
             histN.set("historyNodeId", str(i))
+            have_hist_nodes = True
             
             # TODO: parent
             histN.set("logicalName", h.getLogicalName())
@@ -125,6 +127,35 @@ def write_history_nodes(self):
             self.setAttr(histN, "vendorToolVersion", h.getVendorToolVersion())
             self.setIfNonNeg(histN, "sameTests", h.getSameTests())
             self.setIfNonNull(histN, "comment", h.getComment())
+
+        if not have_hist_nodes:
+            # XML requires history nodes, so add a dummy history node
+            histN = self.mkElem(self.root, "historyNodes")
+            histN.set("historyNodeId", str(0))
+
+            histN.set("logicalName", "dummy")
+            self.setIfNonNull(histN, "physicalName", "dummy")
+            self.setIfNonNull(histN, "kind", "dummy")
+            self.setAttrBool(histN, "testStatus", True)
+            self.setIfNonNeg(histN, "simtime", 0)
+            self.setIfNonNull(histN, "timeunit", 0)
+            self.setIfNonNull(histN, "runCwd", "")
+            self.setIfNonNeg(histN, "cpuTime", 0)
+            self.setIfNonNull(histN, "seed", 0)
+            self.setIfNonNull(histN, "cmd", "")
+            self.setIfNonNull(histN, "args", "")
+#            self.setIfNonNull(histN, "compulsory", h.getCompulsory())
+            self.setAttrDateTime(histN, "date", datetime.now().strftime("%Y%m%d%H%M%S"))
+            self.setIfNonNull(histN, "userName", "dummy")
+#            self.setIfNonNeg(histN, "cost", h.getCost())
+            self.setAttr(histN, "toolCategory", "unknown")
+            self.setAttr(histN, "ucisVersion", "1.0")
+            self.setAttr(histN, "vendorId", "unknown")
+            self.setAttr(histN, "vendorTool", "PyUCIS")
+            self.setAttr(histN, "vendorToolVersion", "unknown")
+#            self.setIfNonNeg(histN, "sameTests", h.getSameTests())
+#            self.setIfNonNull(histN, "comment", h.getComment())
+
             
             # TODO: userAttr