ICNV Phase during SAP ERP Upgrade

[former_member211727]

Hello All,

We are doing an Upgrade of our r/3 system from 4.7 to ERP EHP6. Currently the upgrade of Production system is in progress. We are in the Preprocessing phase of the Upgrade where the ICNV is running.

The concern here is :

In the upgrade of Pre-Production system, the ICNV determined 5 tables for conversion whereas in the Production system only 3 tables. The two tables ignored in the Production are big tables (size approx 5GB) and have around 31million entries. The other 3 tables are not as big as these tables. My question is :

Q> How does system ( ICNV program ) determines the tables to be converted? What is the criterion? Can we include tables for the conversion?

Also my concern is that as these 2 big tables are not converted in ICNV, is there a chance of increased Downtime??

Please advise ASAP.

Thanks!!

[Former Member]

Hi Rahul

did you read this great blog?

http://scn.sap.com/people/sachin.pokalwar2/blog/2011/03/15/incremental-conversion-during-release-upg...

Let me know if it's useful

Regards

a

[premsukh_bishnoi]

Hi,

Could you please tell us the name of tables were ignored in production env.

The ICNV (incremental table conversion) is used to reduce the runtime of

the PCON phase and, thus, reduce the downtime of the system during the

upgrade. The PREPARE (ICNVREQ_PRP phase) determines candidates for the

ICNV which are then listed there. The user must then decide which

non-modified candidates should be converted incrementally and which

modified candidates should return to the standard SAP System and are

consequently converted incrementally.

If the determined tables are not to be converted incrementally, no

action is necessary and they are then converted in the PCON phase. More

detailed information about the ICNV is available in the upgrade guide

and in the ICNV online documentation.

Please read below notes which might be helpful.

SAP Note No. 24864

Regards, Premsukh

[former_member211727]

Hello Andrea and Premsukh,

Thanks for your response.

Andrea,

I know the procedure to do the ICNV. My question was why were 2 tables skipped/ignored automatically during the run of Production system compared to Pre-Production system? How does it identify/determine the candidates for ICNV?

Premsukh,

The tables are COSP and COSS. The same question as above. Why these tables were skipped by the system during Production system whereas it identified them during Pre-production upgrade?

Hope my question is clear.

Thanks!!

[Reagan]

Good Day

Why these tables were skipped by the system during Production system whereas it identified them during Pre-production upgrade?

Good question.

You need to redirect this question to the upgrade tools development team.

Read this link:

http://help.sap.com/saphelp_nw04/helpdata/en/1c/525643a38a11d194a100a0c930df15/content.htm

During the "prepare" phase of the upgrade, the system checks whether transaction ICNV can run with your database.

So the behavior of the tool is to be questioned.

Regards

RB

[former_member211727]

Thanks All.

Regards