How to pass data thru COMMAREA more than 64kb

muthukumarapandian

Hi,

The size of the commarea is 64 kb if i want to store more than that means is it possible or not.

rick · Posted: Tue Mar 01, 2005 2:38 pm Post subject:

Hi,

It is not possible to have DFHCOMMAREA more than 64KB.

Thanks and Regards,
Rick.

meetsrk · Active User Joined: 13 Jun 2004 Posts: 86

hi,

I suspect its not 64KB, its 32KB.

if u wanna store more than 32KB, then go for TSQ(Temporary storage queue).

mcmillan · Site Admin Joined: 18 May 2003 Posts: 918 Location: India

Dear Metsrk,

You are correct. The maximum size of DFHCOMMAREA is 32,500 bytes, however it is recommended (by IBM) not to exceed 24K.

ganmain · New User Joined: 19 Feb 2005 Posts: 25

HI,
I want to know why we are declaring commarea in both working
storage & linkage section(dfhcommarea).

if my cics program is not calling another program
only commarea declaring in working storage section is enough
or
we have to declare both in working storage & linkage section ?

please clarify this doubt

mcmillan · Site Admin Joined: 18 May 2003 Posts: 918 Location: India

ganmain · New User Joined: 19 Feb 2005 Posts: 25

thanks for your reply

but still iam having doubt in that
if my program is of psudo conversation ie return(transid) but it is not
calling another program then declaring dfhcommarea in linkage section is necessary or not necessary?

please clarify this

mainframemouli · Active User Joined: 01 Mar 2005 Posts: 53 Location: Mysore

Even if you are not including the DFHCOMMAREA the system will automatically include it in the program.

If your program uses a Psued0-conversational then You also include the COMMAREA option to name the area of working storage that will be stored in the CICS communication area between program executions. When the RETURN command is issued in this form, the program associated with the trans-id will be started the next time the user presses an attention key

manoj_madhavan · New User Joined: 07 Mar 2005 Posts: 12

but sir ....it is necessary for a commarea declaration only when u pass some value through the commarea...

else is it necessary for a separate definition both in the workin storage as well as linkage section?

mcmillan · Site Admin Joined: 18 May 2003 Posts: 918 Location: India

manoj_madhavan · New User Joined: 07 Mar 2005 Posts: 12

i was asking the declaration situation when u dont pass in any parameters.......ie, u dont use commrea for passing values but simply return with a transaction id without any parameters.....

in such a situation is it necessary to have declararion for commarea and dfhcommarea??

mcmillan · Site Admin Joined: 18 May 2003 Posts: 918 Location: India

sarma Kappagantu · New User Joined: 17 Mar 2005 Posts: 22 Location: Bangalore

Commarea passed with XCTL & LINK can be 32,673 bytes at the max. (4 bytes less than 32K - 1. However, it is 24K on RETURN command.

CICS Application Programming Guide specifies that "The length of a COMMAREA on a RETURN command can vary from transaction to transaction, up to a theoretical upper limit of 32,763 bytes. However to be safe, you should not exceed 24KB ?, because of a number of factors that can reduce the limit from the theoretical maximum.?

If you wish to pass more than 24 KB, you may use BTS container, if the version of CICS is CICS TS1.3 or higher.

kavi · New User Joined: 03 Mar 2005 Posts: 2

You can use getmain to get the maximum address and by pointer reference you can acess the data.

The size of the DHFCOMMAREA is 64kb and it is not 32 kb reply to me if i am wrong.

raguibmm · New User Joined: 16 Mar 2005 Posts: 4

Commarea passed with XCTL & LINK can be 32,673 bytes at the max. (4 bytes less than 32K - 1. However, it is 24K on RETURN command.

CICS Application Programming Guide specifies that "The length of a COMMAREA on a RETURN command can vary from transaction to transaction, up to a theoretical upper limit of 32,763 bytes. However to be safe, you should not exceed 24KB ?, because of a number of factors that can reduce the limit from the theoretical maximum.?

If you wish to pass more than 24 KB, you may use BTS container, if the version of CICS is CICS TS1.3 or higher.

what is bts container?