CPF4131出现在程序文件中的可能原因是什么？
我们如何解决这个问题呢？
Message . . . . : Error message CPF4131 appeared during OPEN for file
TEST (C S D F).
Cause . . . . . : RPG procedure TEST2 in program TESTLIB/TEST2
received the message CPF4131 while performing an implicit OPEN operation on
file SOURCE. The actual file is SOURCE.