Cobol-81 on RSX11m+
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Andrew Barron
Dec 15, 2025, 4:43:10 PM (3 days ago) Dec 15
to [PiDP-11]
Hi, I am missing something basic. Every time I compile, I get one fatal error. Probably a missing line. This code worked on the COBOL-68 on TOPS-10 (PiDP10).
I tried compiling with the ANSI switch, but although it got rid of the warnings, the fatal error persists. I tried two other Cobol programs that worked on the PiDP10 and they both have the same problem.
$ COBOL CHELLO.CBL
C81 - 1 FATAL ERRORS - object deleted
C81 - 0 WARNINGS
C81 - 4 INFORMATIONALS
$ EDT CHELLO.CBL
*C
IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.
DISPLAY "HELLO WORLD!".
STOP RUN.
[EOB]
*C
IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.
DISPLAY "HELLO WORLD!".
STOP RUN.
[EOB]
$ COBOL/ANSI_FORMAT CHELLO.CBL
C81 - 1 FATAL ERRORS - object deleted
C81 - 0 WARNINGS
C81 - 0 INFORMATIONALS
C81 - 1 FATAL ERRORS - object deleted
C81 - 0 WARNINGS
C81 - 0 INFORMATIONALS
$ COBOL CHELLO.CBL
C81 - 1 FATAL ERRORS - object deleted
C81 - 0 WARNINGS
C81 - 4 INFORMATIONALS
cheers AndrewB
Johnny Billquist
Dec 15, 2025, 4:50:27 PM (3 days ago) Dec 15
to pid...@googlegroups.com
You should add /LIST, so you get a listing file for the compilation.
That will tell you what your problems are in more detail.
But basically (from doing that myself):
1 * C
2 IDENTIFICATION DIVISION.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
3 PROGRAM-ID. HELLO.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
4 ENVIRONMENT DIVISION.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
5 DATA DIVISION.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
6 PROCEDURE DIVISION.
7 DISPLAY "HELLO WORLD!".
^
*** F 590 A section header or paragraph-name is required.
8 STOP RUN.
I don't know enough Cobol to make much sense of this. :-)
Johnny
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Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: b...@softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
That will tell you what your problems are in more detail.
But basically (from doing that myself):
1 * C
2 IDENTIFICATION DIVISION.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
3 PROGRAM-ID. HELLO.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
4 ENVIRONMENT DIVISION.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
5 DATA DIVISION.
^
*** I 292 Division, section and paragraph headers must begin in Area A.
6 PROCEDURE DIVISION.
7 DISPLAY "HELLO WORLD!".
^
*** F 590 A section header or paragraph-name is required.
8 STOP RUN.
I don't know enough Cobol to make much sense of this. :-)
Johnny
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--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: b...@softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Ken Hansen
Dec 15, 2025, 5:12:18 PM (3 days ago) Dec 15
to pid...@googlegroups.com
COBOL was originally input via so-called "Hollerith cards", and program text was to start on a particular column (7? 8?) the first several columns were for labels.
Apparently, COBOL-68 is playing fast-and-loose with that requirement, ANSI COBOL is stricter.
It's been 30 years since I touched COBOL, but that's what the first 4 errors are.
See https://www.ibmmainframer.com/cobol-tutorial/cobol-hello-world/
Apparently, COBOL-68 is playing fast-and-loose with that requirement, ANSI COBOL is stricter.
It's been 30 years since I touched COBOL, but that's what the first 4 errors are.
See https://www.ibmmainframer.com/cobol-tutorial/cobol-hello-world/
(They are discussing modern cobol, not 'classic' book-68)
Ken
On Dec 15, 2025, at 15:43, Andrew Barron <zl...@outlook.co.nz> wrote:
Hi, I am missing something basic. Every time I compile, I get one fatal error. Probably a missing line. This code worked on the COBOL-68 on TOPS-10 (PiDP10). I tried compiling with the ANSI switch, but although it got rid of the warnings, the fatal error persists. I tried two other Cobol programs that worked on the PiDP10 and they both have the same problem.
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Ken Hansen
Dec 15, 2025, 6:04:02 PM (3 days ago) Dec 15
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Also, looking at ibm mainframer example, single quotes vs double quotes?
Ken
On Dec 15, 2025, at 15:50, Johnny Billquist <b...@softjar.se> wrote:
You should add /LIST, so you get a listing file for the compilation. That will tell you what your problems are in more detail.
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Peter Long
Dec 15, 2025, 6:06:16 PM (3 days ago) Dec 15
to Ken Hansen, pid...@googlegroups.com
Double quotes works - the only other thing is that you need a MAIN-PARA.
>type hello.c81
>type hello.c81
IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.
MAIN-PARA.
DISPLAY "HELLO WORLD".
STOP RUN.
>
>type hello.lst
HELLO 16-DEC-2025 10:01:44 COBOL-81 V3.1-00 PAGE 1
16-DEC-2025 10:01:27 DU:[PLONG]HELLO.C81;4
1 IDENTIFICATION DIVISION.
2 PROGRAM-ID. HELLO.
3 ENVIRONMENT DIVISION.
4 DATA DIVISION.
5 PROCEDURE DIVISION.
6 MAIN-PARA.
7 DISPLAY "HELLO WORLD".
8 STOP RUN.
9
HELLO 16-DEC-2025 10:01:44 COBOL-81 V3.1-00 PAGE 2
16-DEC-2025 10:01:27 DU:[PLONG]HELLO.C81;4
DIAGNOSTICS
No Errors
COMMAND SWITCHES
HELLO,HELLO,=HELLO.C81/CVF
/-CRF/-DEB/CVF/BOU/-MAP/PER/-CIS/INF/-SUB/SKL/-TRU/-BLD/-FIP/-CON/-FLG/-STA
>
From: pid...@googlegroups.com <pid...@googlegroups.com> on behalf of Ken Hansen <n2...@w5fc.org>
Sent: Tuesday, December 16, 2025 10:03
Cc: pid...@googlegroups.com <pid...@googlegroups.com>
Subject: Re: [PiDP-11] Cobol-81 on RSX11m+
Sent: Tuesday, December 16, 2025 10:03
Cc: pid...@googlegroups.com <pid...@googlegroups.com>
Subject: Re: [PiDP-11] Cobol-81 on RSX11m+
To view this discussion visit
https://groups.google.com/d/msgid/pidp-11/059C7ED5-FD29-4B8C-A31D-ABA13A2B5FCA%40w5fc.org.
Lawrence Kesteloot
Dec 15, 2025, 6:18:54 PM (3 days ago) Dec 15
to Peter Long, Ken Hansen, pid...@googlegroups.com
Oh I'm so excited about this! It's on my list to learn COBOL next year. I was going to use some compiler on macOS, but this thread makes me want to learn it on the PiDP-11 through my ADM-3A.
Lawrence
To view this discussion visit https://groups.google.com/d/msgid/pidp-11/SYBPR01MB6938008B20166D0C7DB530F98BADA%40SYBPR01MB6938.ausprd01.prod.outlook.com.
Johnny Billquist
Dec 15, 2025, 6:19:18 PM (3 days ago) Dec 15
to pid...@googlegroups.com
I guess the next question is how you link that thing. :-)
(I can figure that out if others can't...)
Johnny
> ------------------------------------------------------------------------
> *From:* pid...@googlegroups.com <pid...@googlegroups.com> on behalf of
> Ken Hansen <n2...@w5fc.org>
> *Sent:* Tuesday, December 16, 2025 10:03
> *Cc:* pid...@googlegroups.com <pid...@googlegroups.com>
> *Subject:* Re: [PiDP-11] Cobol-81 on RSX11m+
> pidp-11/059C7ED5-FD29-4B8C-A31D-ABA13A2B5FCA%40w5fc.org <https://
> groups.google.com/d/msgid/pidp-11/059C7ED5-FD29-4B8C-A31D-
> ABA13A2B5FCA%40w5fc.org?utm_medium=email&utm_source=footer>.
(I can figure that out if others can't...)
Johnny
> *From:* pid...@googlegroups.com <pid...@googlegroups.com> on behalf of
> Ken Hansen <n2...@w5fc.org>
> *Sent:* Tuesday, December 16, 2025 10:03
> *Cc:* pid...@googlegroups.com <pid...@googlegroups.com>
> *Subject:* Re: [PiDP-11] Cobol-81 on RSX11m+
> groups.google.com/d/msgid/pidp-11/059C7ED5-FD29-4B8C-A31D-
> ABA13A2B5FCA%40w5fc.org?utm_medium=email&utm_source=footer>.
>
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Johnny Billquist
Dec 15, 2025, 6:37:57 PM (3 days ago) Dec 15
to pid...@googlegroups.com
To link, just add /C81 to the command line for linking, and you are all
good.
$ cob test7/ansi/list
$ link test7/c81
$ run test7
HELLO WORLD!
$
Johnny
>> You should add /LIST, so you get a listingfile for the
>> one fatal error. Probably amissing line. This code worked on
>> Johnny Billquist || "I'mon a bus
good.
$ cob test7/ansi/list
$ link test7/c81
$ run test7
HELLO WORLD!
$
Johnny
>> the COBOL-68 on TOPS-10 (PiDP10). I tried compiling with the
>> ANSI switch, but although it got rid of the warnings, the fatal
>> error persists. I tried twoother Cobol programs that worked on
>> ANSI switch, but although it got rid of the warnings, the fatal
Peter Long
Dec 15, 2025, 6:38:28 PM (3 days ago) Dec 15
to Johnny Billquist, pid...@googlegroups.com
Lol - pretty much as you'd expect
>LINK HELLO,[1,1]C81LIB/LIB ...
Btw - thanks for auto-including the RTLs when you install C81 - one less thing ;-)
Peter
From: pid...@googlegroups.com <pid...@googlegroups.com> on behalf of Johnny Billquist <b...@softjar.se>
Sent: Tuesday, 16 December 2025 10:19
To: pid...@googlegroups.com <pid...@googlegroups.com>
Subject: Re: [PiDP-11] Cobol-81 on RSX11m+
Sent: Tuesday, 16 December 2025 10:19
To: pid...@googlegroups.com <pid...@googlegroups.com>
Subject: Re: [PiDP-11] Cobol-81 on RSX11m+
To view this discussion visit
https://groups.google.com/d/msgid/pidp-11/d8b8499e-315f-4072-9f62-041bbdf3f7aa%40softjar.se.
Johnny Billquist
Dec 15, 2025, 6:42:48 PM (3 days ago) Dec 15
to Peter Long, pid...@googlegroups.com
Yeah. That works. But DCL even have some more fancy bits for automating
cobol linking, as you can see in my mail.
Also, I suspect, depending on what you do in your program, other
libraries might be required as well.
And if you run C81 from MCR, there is also the /BLD switch, which
creates the command files to do the linking. Which can also be done with
the BLD command (which is what LINK /C81 does in the end).
For example, if you do sorting, I believe Cobol will include the
sort/merge libraries.
Johnny
On 2025-12-16 00:38, Peter Long wrote:
> Lol - pretty much as you'd expect
>
> >LINK HELLO,[1,1]C81LIB/LIB ...
>
>
> Btw - thanks for auto-including the RTLs when you install C81 - one less
> thing ;-)
>
>
> Peter
> *Sent:* Tuesday, 16 December 2025 10:19
> *To:* pid...@googlegroups.com <pid...@googlegroups.com>
>> C81 - 1 FATAL ERRORS -object deleted
>> To view this discussion visit https://groups.google.com/d/msgid/ <https://groups.google.com/d/msgid/>
> msgid/pidp-11/>
>> SYBPR01MB6938008B20166D0C7DB530F98BADA%40SYBPR01MB6938.ausprd01.prod.outlook.com <https://groups.google.com/d/msgid/pidp-11/
> SYBPR01MB6938008B20166D0C7DB530F98BADA%40SYBPR01MB6938.ausprd01.prod.outlook.com?utm_medium=email&utm_source=footer <https://groups.google.com/d/msgid/pidp-11/SYBPR01MB6938008B20166D0C7DB530F98BADA%40SYBPR01MB6938.ausprd01.prod.outlook.com?utm_medium=email&utm_source=footer>>.
> groups.google.com/d/msgid/pidp-11/
> d8b8499e-315f-4072-9f62-041bbdf3f7aa%40softjar.se>.
cobol linking, as you can see in my mail.
Also, I suspect, depending on what you do in your program, other
libraries might be required as well.
And if you run C81 from MCR, there is also the /BLD switch, which
creates the command files to do the linking. Which can also be done with
the BLD command (which is what LINK /C81 does in the end).
For example, if you do sorting, I believe Cobol will include the
sort/merge libraries.
Johnny
On 2025-12-16 00:38, Peter Long wrote:
> Lol - pretty much as you'd expect
>
> >LINK HELLO,[1,1]C81LIB/LIB ...
>
>
> Btw - thanks for auto-including the RTLs when you install C81 - one less
> thing ;-)
>
>
> Peter
> ------------------------------------------------------------------------
> *From:* pid...@googlegroups.com <pid...@googlegroups.com> on behalf of
> Johnny Billquist <b...@softjar.se>
> *From:* pid...@googlegroups.com <pid...@googlegroups.com> on behalf of
> *Sent:* Tuesday, 16 December 2025 10:19
> *To:* pid...@googlegroups.com <pid...@googlegroups.com>
>>
>> C81 - 0 WARNINGS
>>
>> C81 - 0 INFORMATIONALS
>>
>> $ COBOL CHELLO.CBL
>>
>> C81 - 1 FATAL ERRORS -object deleted
>> C81 - 0 WARNINGS
>>
>> C81 - 0 INFORMATIONALS
>>
>> $ COBOL CHELLO.CBL
>>
>>
>> C81 - 0 WARNINGS
>>
>> C81 - 4 INFORMATIONALS
>>
>> cheers AndrewB
>>
>> --
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>> C81 - 0 WARNINGS
>>
>> C81 - 4 INFORMATIONALS
>>
>> cheers AndrewB
>>
>> --
>>
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>>
>> --
>> Johnny Billquist || "I'm on a bus
>> || on a psychedelic trip
>> email: b...@softjar.se || Reading murder books
>> pdp is alive! || tryin' to stay hip" - B. Idol
>>
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>> --
>> Johnny Billquist || "I'm on a bus
>> || on a psychedelic trip
>> email: b...@softjar.se || Reading murder books
>> pdp is alive! || tryin' to stay hip" - B. Idol
>>
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> --
> Johnny Billquist || "I'm on a bus
> || on a psychedelic trip
> email: b...@softjar.se || Reading murder books
> pdp is alive! || tryin' to stay hip" - B. Idol
>
> --
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> --
> Johnny Billquist || "I'm on a bus
> || on a psychedelic trip
> email: b...@softjar.se || Reading murder books
> pdp is alive! || tryin' to stay hip" - B. Idol
>
> --
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Andrew Barron
Dec 15, 2025, 10:17:09 PM (3 days ago) Dec 15
to [PiDP-11]
Thanks everyone!
DISPLAY "HELLO WORLD!".
STOP RUN.
I got it to work! This is Cobol-81 on RSX11m+ It seems to like the slash between divisions. I thought those were only to add page feeds to the printout. I copied the Environment Configuration Section from a COBOL file in [215215] . I changed the line MAIN-LOGIC. to MAIN-PARA. Any name will work and PROC makes more sense.
I compiled it with $ COBOL/LIST CHELLO.CBL no need for the ANSI statement. I may need that on a longer program. I will try '99 bottles of beer' next.
I linked it with $ LINK/C81 CHELLO then ran the task as RUN CHELLO
This is the code that worked.
IDENTIFICATION DIVISION.
PROGRAM-ID. CHELLO.
/
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
SOURCE-COMPUTER. PDP-11.
OBJECT-COMPUTER. PDP-11
SEGMENT-LIMIT IS 10.
/
DATA DIVISION.
/
PROCEDURE DIVISION.
MAIN-PROC.
PROGRAM-ID. CHELLO.
/
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
SOURCE-COMPUTER. PDP-11.
OBJECT-COMPUTER. PDP-11
SEGMENT-LIMIT IS 10.
/
DATA DIVISION.
/
PROCEDURE DIVISION.
MAIN-PROC.
DISPLAY "HELLO WORLD!".
STOP RUN.
Andrew Barron
Dec 15, 2025, 10:34:54 PM (3 days ago) Dec 15
to [PiDP-11]
I trimmed it down and it still works.
IDENTIFICATION DIVISION.
PROGRAM-ID. CHELLO.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.
MAIN-PROC.
DISPLAY "HELLO WORLD!".
STOP RUN.
[EOB]
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