Issue with empty roots bundle

lib/schemaUtils.js

@@ -4931,23 +4931,21 @@ module.exports = {
       try {
         res.output.data = this.mapProcessRelatedFiles(inputRelatedFiles.rootFiles, inputRelatedFiles.data,
           inputRelatedFiles.origin, version, inputRelatedFiles.bundleFormat, toBundle);
+        if (res.output.data === undefined || res.output.data.length === 0 ||
+          res.output.data.result === false) {
+          res.result = false;
+        }
+        return res;
       }
       catch (error) {
         if (error instanceof ParseError) {
-          return {
-            result: false,
-            reason: error.message
-          };
-        }
-        else {
           throw (error);
         }
+        let newError = new Error('There was an error during the process');
+        newError.stack = error.stack;
+        throw (newError);
       }
-      if (res.output.data.result === false) {
-        res.result = res.output.data.result;
-        res.error = res.output.data.error;
-      }
-      return res;
+
     }
     else {
       return res;
@@ -4957,11 +4955,12 @@ module.exports = {
   /**
    *
    * @description Validates the input for multi file APIs
-   * @param {string} processInput - Process input data
+   * @param {object} processInput - Process input data
+   * @param {boolean} bundleProcess - Wheter the process input corresponds to bundel process
    *
    * @returns {undefined} - nothing
    */
-  validateInputMultiFileAPI(processInput) {
+  validateInputMultiFileAPI(processInput, bundleProcess = false) {
     if (_.isEmpty(processInput)) {
       throw new Error('Input object must have "type" and "data" information');
     }
@@ -4974,5 +4973,8 @@ module.exports = {
     if (processInput.data[0].path === '') {
       throw new Error('"Path" of the data element should be provided');
     }
+    if (bundleProcess && (!processInput.rootFiles || processInput.rootFiles.length === 0)) {
+      throw new Error('"RootFiles" parameter should be provided');
+    }
   }
 };