# Common Classpath Problems

Error Loading Classes

The following are some common TopLink Workbench error messages that may result from invalid classpath information. See "Configuring Project Classpath" for more information.

The TopLink Workbench does not display the class(es) to import.
  Cause: Your classes are not available for import on the Select Classes dialog box.
  Action: Ensure that the class is in your project's classpath (on the project's General properties tab). Ensure that the class is in the `.zip` or `.jar` file. You cannot import compressed classes.

The TopLink Workbench generates an exception error when importing classes.
  Cause: TopLink class import utility did not start correctly. One of the classes includes a static initialization method, which may cause the import utility to fail.
  Action: Ensure that your project's classpath points to the root directory of your package hierarchy. For example, to import the `com.company.class` package in the `C:\classes\com\company` directory, your project classpath should be `C:\classes\`.

The TopLink Workbench fails to import the class, but does not generate an exception error.
  Cause: The classpath containing your JDBC drivers should still be on your system CLASSPATH. TopLink Workbench classpath is for domain classes only.
  Action: Ensure that you have properly indicated the directories that contain your domain class(es) to map on the project's General tab.

See Also

  TopLink Workbench Error Reference