diff --git a/data-queryable.js b/data-queryable.js
index a96a406..7924189 100644
--- a/data-queryable.js
+++ b/data-queryable.js
@@ -2744,6 +2744,8 @@ function afterExecute_(result, callback) {
                                 return cb(err);
                             });
                     }
+                    // throw association error if mapping is not set
+                    return cb(new DataError('EASSOC', sprintf('Data association mapping (%s) for %s cannot be determined.', mapping.refersTo, self.model.name)));
                 }
                 else {
                     return cb(new Error('Not yet implemented'));
diff --git a/package-lock.json b/package-lock.json
index a80f35f..48b4c6d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@themost/data",
-  "version": "2.6.98",
+  "version": "2.6.99",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
diff --git a/package.json b/package.json
index 40fb48f..4cd7669 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@themost/data",
-  "version": "2.6.98",
+  "version": "2.6.99",
   "description": "MOST Web Framework Codename Blueshift - Data module",
   "main": "index.js",
   "types": "index.d.ts",