COBOL Runtime Error Code – 012 Attempt to open a file which is already

In this post, you’ll learn about the COBOL runtime Error Code 012 and the reason why you are receiving it

COBOL Error Code :

012

Reason for this Error in COBOL

Attempt to open a file which is already open (Recoverable) -You have tried to open a file which is already open and so cannot be opened again. -Cancel your second attempt to open the file. If the fact that the file is already open is acceptable to you, continue to run your program.