diff --git a/src/common.ts b/src/common.ts
index 9de0f34..9a6db1d 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -5,6 +5,7 @@ const exec = util.promisify(child_process.exec);
 import { Config } from './config';
 import {OptionValues} from 'commander';
 import {getOptions} from './utils';
+import {MultiClaspErrors} from './mutli-clasp-errors';
 
 
 /**
@@ -69,6 +70,8 @@ export async function foreachClasp(fn:(claspConfig:SingleClasp)=>Promise<void>):
  */
 export async function genericAction(): Promise<void> {
   foreachClasp(async (claspConfig)=>{
-    await runClasp(claspConfig, process.argv[2], getOptions());
+    if(!(await runClasp(claspConfig, process.argv[2], getOptions()))){
+      throw MultiClaspErrors.ClaspError;
+    }
   });
 }
diff --git a/src/mutli-clasp-errors.ts b/src/mutli-clasp-errors.ts
new file mode 100644
index 0000000..3c121ea
--- /dev/null
+++ b/src/mutli-clasp-errors.ts
@@ -0,0 +1,7 @@
+/**
+ * Multi Clasp Errors.
+ */
+export enum MultiClaspErrors {
+  InvalidJson = "Invalid json",
+  ClaspError = "Clasp Error",
+}
diff --git a/src/Globals.d.ts b/src/types.d.ts
similarity index 99%
rename from src/Globals.d.ts
rename to src/types.d.ts
index 34e73cf..74dbd38 100644
--- a/src/Globals.d.ts
+++ b/src/types.d.ts
@@ -1,4 +1,3 @@
-
 /**
  * SingleClasp configuration type
  */
diff --git a/src/utils.ts b/src/utils.ts
index 57906ae..aab4547 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,3 +1,5 @@
+import {MultiClaspErrors} from "./mutli-clasp-errors";
+
 /**
  * Parses input string into a valid JSON object or throws a `ClaspError` error.
  * @param value JSON string.
@@ -6,7 +8,7 @@ export const parseJsonOrDie = <T>(value: string): T => {
   try {
     return JSON.parse(value) as T;
   } catch {
-    throw "Invalid json";
+    throw MultiClaspErrors.InvalidJson;
   }
 };
 
diff --git a/test/run.test.ts b/test/run.test.ts
index 9ac58f8..6a72f7c 100644
--- a/test/run.test.ts
+++ b/test/run.test.ts
@@ -1,9 +1,10 @@
+import {MultiClaspErrors} from "../src/mutli-clasp-errors";
 import {getRunClaspArgs} from "../src/run";
 
 
 describe('run.ts tests', ()=>{
   test('wrong inputs', () => {
-    expect(()=>(getRunClaspArgs("", {nondev:false, params:''}))).toThrow("Invalid json");
+    expect(()=>(getRunClaspArgs("", {nondev:false, params:''}))).toThrow(MultiClaspErrors.InvalidJson);
   });
   test('good inputs', () => {
     expect(getRunClaspArgs("testFunc", {nondev:false, params:'[]'})).toBe("testFunc --params '[]'");