diff --git a/packages/caching/src/application/ClassSourceBuilder.ts b/packages/caching/src/application/ClassSourceBuilder.ts
index 5c00f8a2..d408ddb9 100644
--- a/packages/caching/src/application/ClassSourceBuilder.ts
+++ b/packages/caching/src/application/ClassSourceBuilder.ts
@@ -1,5 +1,6 @@
 
 import { Module } from '../module';
+import { FileHelper } from '../utils';
 
 export default class ClassSourceBuilder
 {
@@ -12,7 +13,7 @@ export default class ClassSourceBuilder
 
     build(): string
     {
-        const filename = this.#module.filename;
+        const filename = FileHelper.addSubExtension(this.#module.filename, 'shared');
         const classes = this.#module.reflection.exportedClasses;
         const classNames = classes.map(clazz => clazz.name);
         const sourceCode = classNames.map(className => `${className}.source = "/${filename}";`);
diff --git a/packages/jitar/rollup.definitions.js b/packages/jitar/rollup.definitions.js
index 2726f835..1159f772 100644
--- a/packages/jitar/rollup.definitions.js
+++ b/packages/jitar/rollup.definitions.js
@@ -13,7 +13,7 @@ export const SERVER_EXTERNALS =
 
 export const REPLACE_VALUES =
 {
-    'RUNTIME_ERROR_LOCATION': '/jitar/client.js',
-    'RUNTIME_HOOKS_LOCATION': '/jitar/client.js',
+    'RUNTIME_ERROR_LOCATION': 'jitar',
+    'RUNTIME_HOOKS_LOCATION': 'jitar',
     'JITAR_LIBRARY_NAME': 'jitar',
 };
diff --git a/packages/jitar/src/client.ts b/packages/jitar/src/client.ts
index 3c816a86..1174e3dc 100644
--- a/packages/jitar/src/client.ts
+++ b/packages/jitar/src/client.ts
@@ -28,7 +28,7 @@ export
     // InvalidVersionNumber,
     // MissingParameterValue,
     // ModuleNotAccessible,
-    // ModuleNotLoaded,
+    ModuleNotLoaded,
     // NoWorkerAvailable,
     // ProcedureNotAccessible,
     // ProcedureNotFound,
@@ -39,3 +39,9 @@ export
     // startClient,
     getClient
 } from '@jitar/runtime';
+
+export
+{
+    ClassNotFound,
+    InvalidClass
+} from '@jitar/serialization';
\ No newline at end of file
diff --git a/packages/runtime/src/lib.ts b/packages/runtime/src/lib.ts
index 6676c03c..cc17eee2 100644
--- a/packages/runtime/src/lib.ts
+++ b/packages/runtime/src/lib.ts
@@ -4,7 +4,7 @@ export { AccessLevels, Segment, Procedure, Implementation, Version, NamedParamet
 export { HealthCheck } from './health';
 export { MiddlewareManager, Middleware, NextHandler } from './middleware';
 export { Gateway, LocalGateway, RemoteGateway, Proxy, Repository, LocalRepository, RemoteRepository, Worker, LocalWorker, RemoteWorker, Service, RunnerService } from './services';
-export { File, Files, FileManager, FileNotFound, ImportFunction, ClassModuleLoader, SourceManager } from './source';
+export { File, Files, FileManager, FileNotFound, ImportFunction, ClassModuleLoader, SourceManager, ModuleNotLoaded } from './source';
 
 export { default as RuntimeBuilder } from './RuntimeBuilder.js';
 
diff --git a/packages/runtime/src/source/SourceManager.ts b/packages/runtime/src/source/SourceManager.ts
index 9eafc44c..a763a396 100644
--- a/packages/runtime/src/source/SourceManager.ts
+++ b/packages/runtime/src/source/SourceManager.ts
@@ -20,10 +20,13 @@ export default class SourceManager
     {
         try
         {
+            // If the specifier is an absolute path, we need to convert it to a path
+            // relative to the cache folder.
+            
             const fullSpecifier = specifier.startsWith('/')
-                ? this.#fileManager.getAbsoluteLocation(specifier)
+                ? this.#fileManager.getAbsoluteLocation(`.${specifier}`)
                 : specifier;
-
+            
             return await this.#import(fullSpecifier);
         }
         catch (error: unknown)
diff --git a/packages/runtime/src/source/index.ts b/packages/runtime/src/source/index.ts
index 13b2a439..0a980de7 100644
--- a/packages/runtime/src/source/index.ts
+++ b/packages/runtime/src/source/index.ts
@@ -2,6 +2,7 @@
 export { default as Files } from './definitions/Files';
 
 export { default as FileNotFound } from './errors/FileNotFound';
+export { default as ModuleNotLoaded } from './errors/ModuleNotLoaded';
 
 export { default as FileManager } from './interfaces/FileManager';
 export { default as ModuleImporter } from './interfaces/ModuleImporter';