The user cannot execute a program residing on a TAS host, for one of the following reasons:
The application's file permissions deny access to the user. Log in as the owner of the directory that contains the application, or as root, and correct the file permissions, at realm->Manage File Services ->[select the service]->Administer->Configuration->Umask or with the tnservice command. Remember, DOS programs need to have UNIX read permission.
The application has a attribute that tells DOS the drive on which it resides, but the redirected drive uses a different letter.