diff --git a/.gitignore b/.gitignore
index 987fe56..8ed8e15 100644
--- a/.gitignore
+++ b/.gitignore
@@ -116,4 +116,5 @@ documents.json
 documents-copy.json
 documents-done.json
 documents-error.json
+documents-original.json
 rapport.txt
diff --git a/index.js b/index.js
index 31d7712..df3c03b 100644
--- a/index.js
+++ b/index.js
@@ -47,7 +47,7 @@
       }
     } catch (error) {
       logger('error', ['index', 'document', _id, 'student', student, 'teacher', teacher, 'lookup student', error])
-      documentsError.push({ document, success: false, error: error })
+      documentsError.push({ document, success: false, error: error.message })
       await writeFile('data/documents-error.json', JSON.stringify(documentsError, null, 2), 'utf-8')
     }
   }
diff --git a/lib/get-tjommi-data.js b/lib/get-tjommi-data.js
index fb74cb5..8f9fbed 100644
--- a/lib/get-tjommi-data.js
+++ b/lib/get-tjommi-data.js
@@ -13,10 +13,14 @@ module.exports = async options => {
     logger('info', ['lib', 'get-tjommi-data', 'student', student, 'teacher', teacher, 'success'])
     if (data.length === 1) {
       return data[0]
-    } else {
+    } else if (data.length > 0) {
       const errorMessage = 'too many matches'
       logger('error', ['lib', 'get-tjommi-data', 'student', student, 'teacher', teacher, errorMessage])
       throw new Error(errorMessage)
+    } else if (data.length === 0) {
+      const errorMessage = 'student not found'
+      logger('error', ['lib', 'get-tjommi-data', 'student', student, 'teacher', teacher, errorMessage])
+      throw new Error(errorMessage)
     }
   } catch (error) {
     logger('error', ['lib', 'get-tjommi-data', 'student', student, 'teacher', teacher, error])