Description

why occurs clause cannot be at 01 level ?

Here are some links that might be useful to you:

https://www.ibm.com/docs/en/cobol-linux-x86/1.1?topic=changes-occurs-clauses-in-level-01

https://www.ibm.com/docs/en/cobol-linux-x86/1.1?topic=changes-occurs-clauses-in-level-01
OCCURS clauses in level 01 – IBM
According to Standard COBOL 2002, section 13.16.36.2, Syntax rules for the OCCURS clause, the OCCURS clause cannot be specified in a data description entry that has any of the following items:. A level-number of 01, 66, 77, or 88; A variable-occurrence data item subordinate to it

https://mainframebug.com/tuts/COBOL/module9/Top3_COBOL_OCCURS_Clause.php

https://mainframebug.com/tuts/COBOL/module9/Top3_COBOL_OCCURS_Clause.php
COBOL OCCURS clause with Example and Diagrams Mainframe Bug
Some important consideration while using OCCURS clause are:- OCCURS can be used at elementary or group level; OCCURS cannot be specified at 01, 66, 77 OR 88 LEVEL; Elements of array cannot be referred without subscript; While accessing array element, subscript value should range from 1 to integer value defined during declaration. If found …

https://www.ibmmainframer.com / cobol-tutorial / cobol-occurs-clause

https://www.ibmmainframer.com / cobol-tutorial / cobol-occurs-clause
COBOL – Occurs Clause – COBOL Tutorial – IBMMainframer
Has a level number of 01, 66, 77, or 88. Describes a redefined data item REDEFINES and OCCURS clause cannot appear for the same data item. However REDEFINES clause can appear for a group item whose sub item contains occurs clause. VALUE clause cannot be specified for associated data name defined with or any sub item to the …

https://www.ibm.com/docs/en/cobol-zos/6.2?topic=entry-occurs-clause

https://www.ibm.com/docs/en/cobol-zos/6.2?topic=entry-occurs-clause
OCCURS clause – IBM
Except for the OCCURS clause itself, data description clauses used with the subject apply to each occurrence of the item described. … The OCCURS clause cannot be specified in a data description entry that: Has a level number of 01, 66, 77, or 88. Describes a redefined data item. (However, a redefined item can be subordinate to an item that …

https://www.ibmmainframeforum.com/ibm-cobol/topic3797.html

https://www.ibmmainframeforum.com/ibm-cobol/topic3797.html
Occurs clause at 01 level – IBM Cobol – IBM Mainframe Forum
Basically, because the manual explicitly states that OCCURS cannot be placed on an 01 level. The manual states this because the COBOL standard says so. As to why this restriction exists, you eventually need to go back 50 years to the original COBOL specifications and see what reason, if any, was provided. Robert Sample. Global moderator.

https://stackoverflow.com/questions/20032604/error-using-occurs-in-a-very-simple-cobol-program

https://stackoverflow.com/questions/20032604/error-using-occurs-in-a-very-simple-cobol-program
Error using OCCURS in a very simple COBOL program
A 77 cannot have OCCURS. An 01 cannot have OCCURS. Levels 02-49 can have OCCURS. Forget level 66 (used for the RENAMES clause) as your should not use it and are unlikely to ever see it. An 88-level, a Condition Name, cannot have an occurs, but if the field which it is defined on is part of an or subordinate to an , the 88 will need …

https://www.microfocus.com/documentation/visual-cobol/vc60/DevHub/HRLHLHPDF40F.html

https://www.microfocus.com/documentation/visual-cobol/vc60/DevHub/HRLHLHPDF40F.html
The OCCURS Clause – Micro Focus
The OCCURS clause cannot be specified in a data description entry that: … The OCCURS clause should not be specified in a data description entry at the 01 level or as a 77 level-number. This restriction is removed. In Format 2, the data item defined by data-name-1 must not occupy a character position within the range of the first character …

https://www.mainframestechhelp.com/tutorials/cobol/occurs-clause.htm

https://www.mainframestechhelp.com/tutorials/cobol/occurs-clause.htm
COBOL OCCURS Clause – www.www.mainframestechhelp.com
OCCURS Clause. The OCCURS clause is used to define arrays (or tables). It allows a data item to be repeated a specified number of times. This is particularly useful for handling collections of similar items, such as a list of employee names or a series of monthly totals.

https://ibmmainframes.com/about1984.html

https://ibmmainframes.com/about1984.html
Why occurs clause can’t be used in the 01 level -IBM Mainframes
Posted: Mon May 16, 2005 6:03 pm. once we give occurs clause in a 02 field it need to be occured that much times were as since the 01 level is the group variable we dont need to occur the address space of the group variable.so no need of occurs clause in 01 level.it should not be said ‘not allowed’,it is to be said to be of ‘no nned to write …

https://www.ibmmainframeforum.com/ibm-cobol/topic4305.html

https://www.ibmmainframeforum.com/ibm-cobol/topic4305.html
Occurs on a level 01 – IBM Cobol – IBM Mainframe Forum
why the occurs clause can’t come with 01 level by kiran » Sat Sep 22, 2007 5:16 am 3 Replies 4543 Views Last post by dick scherrer Sat Oct 06, 2007 11:07 pm Occurs clause at 01 level by coollearner » Tue Jul 13, 2010 3:00 pm 1 Replies 1985 Views Last post by Robert Sample Tue Jul 13, 2010 3:31 pm
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