Implicit Opening of Files and Locking of Data Areas

Global files that do not have the USROPN keyword and UDS data areas are opened or locked implicitly during module initialization and during cycle-main-procedure initialization. Static files in subprocedures that do not have the USROPN keyword are opened implicitly the first time the subprocedure is called. Automatic files in subprocedures that do not have the USROPN keyword are opened every time the procedure is called.