diff --git a/executors/node/executor.js b/executors/node/executor.js
index 5838da1d..31c41a68 100644
--- a/executors/node/executor.js
+++ b/executors/node/executor.js
@@ -255,7 +255,10 @@ rl.on('line', function(line) {
     if (test_type == "segmenter") {
       outputLine = segmenter.testSegmenter(parsedJson);
     } else {
-      outputLine = {'error': 'unknown test type',
+      // UNSUPPORTED TEST TYPE!
+      outputLine = {'label': 'UNKNOWN',
+                    'error': 'unknown test type',
+                    'error_detail': 'Requested unsupported test type',
                     'test_type': test_type,
                     'unsupported_test': test_type};
     }
diff --git a/schema/collation/test_schema.json b/schema/collation/test_schema.json
index bb65e68c..472c465f 100644
--- a/schema/collation/test_schema.json
+++ b/schema/collation/test_schema.json
@@ -111,7 +111,11 @@
           "warning": {
             "description": "Present when data has a problem",
             "type": "string"
-          }
+          },
+          "hash_id": {
+            "description": "Has value of the JSON string omtting label value",
+            "type": "integer"
+         }
         },
         "required": [
           "label",
diff --git a/schema/lang_names/test_schema.json b/schema/lang_names/test_schema.json
index dd956f83..b05c8d3e 100644
--- a/schema/lang_names/test_schema.json
+++ b/schema/lang_names/test_schema.json
@@ -55,6 +55,10 @@
          "locale_label": {
            "description": "locale tag of the language being described ",
            "type": "string"
+         },
+          "hash_id": {
+            "description": "Has value of the JSON string omtting label value",
+            "type": "integer"
          }
        },
        "additionalProperties": false
diff --git a/schema/likely_subtags/test_schema.json b/schema/likely_subtags/test_schema.json
index d684b411..4d794bc2 100644
--- a/schema/likely_subtags/test_schema.json
+++ b/schema/likely_subtags/test_schema.json
@@ -85,6 +85,10 @@
          "option": {
            "description": "Type of processing requested",
            "enum": ["maximize", "minimize", "minimizeFavorScript", "minimizeFavorRegion"]
+         },
+          "hash_id": {
+            "description": "Has value of the JSON string omtting label value",
+            "type": "integer"
          }
        }
      },
diff --git a/schema/number_format/test_schema.json b/schema/number_format/test_schema.json
index 5d325760..3ad92a2a 100644
--- a/schema/number_format/test_schema.json
+++ b/schema/number_format/test_schema.json
@@ -182,6 +182,10 @@
                "default": "auto"
              }
            }
+         },
+         "hash_id": {
+           "description": "Has value of the JSON string omtting label value",
+           "type": "integer"
          }
        },
        "required": [
diff --git a/testdriver/testplan.py b/testdriver/testplan.py
index 29909dca..acecd2a5 100644
--- a/testdriver/testplan.py
+++ b/testdriver/testplan.py
@@ -500,9 +500,12 @@ def send_one_line(self, input_line):
                                     capture_output=True,
                                     env=self.exec_env,
                                     shell=True)
-            if not result.returncode:
+            if result.returncode == 0:
+                # Command worked!
                 return result.stdout
             else:
+                input = json.loads(input_line.replace('#EXIT', '').strip())
+                # non-zero return code indicates some kind of problem
                 logging.debug('$$$$$$$$$$$$$$$$ ---> return code: %s', result.returncode)
                 logging.debug('    ----> INPUT LINE= >%s<', input_line)
                 logging.debug('    ----> STDOUT= >%s<', result.stdout)
@@ -512,19 +515,23 @@ def send_one_line(self, input_line):
                 logging.error(' !!!!!! %s' % self.run_error_message)
 
                 # Handle problems with decoding errors and other unknowns.
-                error_result = {'label': 'UNKNOWN',
-                                'input_data': input_line,
-                                'error': self.run_error_message
+                error_result = {'label': input['label'],
+                                'input_data': input,
+                                'error': self.run_error_message,
+                                'error_detail': 'severe error from subprocess ' +
+                                    str(result.returncode)
                                 }
                 return json.dumps(error_result)
         except BaseException as err:
-            logging.error('Err = %s', err)
-            input = json.loads(input_line.replace('#EXIT', '').strip())
-            error_result = {'label': input['label'],
-                            'input_data': input,
-                            'error': err
-                            }
-            return json.dumps(error_result)
-
+            try:
+                input = json.loads(input_line.replace('#EXIT', '').strip())
+                logging.error('Err = %s', err)
+                error_result = {'label': input['label'],
+                                'input_data': input,
+                                'error': err
+                                }
+                return json.dumps(error_result)
+            except BaseException as error:
+                logging.error('testplan.py: Error = %s. input_line = <%s>', err, input_line)
 
         return None