In this post, you’ll learn about the COBOL runtime Error Code 003 and the reason why you are receiving it
COBOL Error Code :
003
Reason for this Error in COBOL
Serial mode error (Recoverable) -You have tried to open a device as a relative or indexed file. You are trying to execute a device, not a program. -Open the device in the correct mode or close any open files, do STOP RUN and recode your program. The name of your program is recognized by the operating system as a valid device. Rename your program.