Hi Frmdeva From your question, it seems that you might not know what a THREAD is. "a thread of execution is a fork of a computer program into two or more concurrently running tasks. " Wikipedia A job turns into a number of simultaneous jobs that might be synced. This is a Web Sphere, Java, C type process. So it you're working in AS/400 native stuff - CL/COBOL/RPGLE you would allocate *JOB. That lock would be in place until the job ends or issues a DCLOBJ command. If a job allocates an object, one of the threads of the job can lock it down further so that no other thread or other job can use it. Phil

Hi Frmdeva From your question, it seems that you might not know what a THREAD is. "a thread of execution is a fork of a computer program into two or more concurrently running tasks. " Wikipedia A job turns into a number of simultaneous jobs that might be synced. This is a Web Sphere, Java, C type process. So it you're working in AS/400 native stuff - CL/COBOL/RPGLE you would allocate *JOB. That lock would be in place until the job ends or issues a DCLOBJ command. If a job allocates an object, one of the threads of the job can lock it down further so that no other thread or other job can use it. Phil