We create substance masters using a change master record. When changing a substance master, we also use a different change master. So we have substance masters with specific time segments containing different information. Question is how SAP is handling the deletion of this substance masters in relation with the time segment. We noticed that (depended on the key date or the change master), some times only a specific time segment of the substance master s deleted and sometimes the complete substance master is deleted.
We couldn't figure out the way to go forward for deleting a specific time segment of the substance master and deleting the complete substance master. Has somebody more insight how this works an what to do?
using "change numbers" in EH&S is quite tricky; frankly: do not use "change numbers"; the topic is very complex (if you use change numbers you need really know what is going on !!). You can not really explain the use of change number to "end users" and the use does have an impact in many submodules of EH&S
Let us try to generate a simple example:
Let us assume you have created 01.01.2012 a REAL_SUB and added an identifier (NAM, PROD). E.g. "Gas"
Now you have prepared the necessary customizing etc. and change numbers are available. Normally this is done on a "daily basis"; that means per day one change number exists.
Now you have generated e..g. a change number valid 01.06.2012 (and afterwards !). You use CG02 together with this change number in "edit" mode. You delete the identifier "Gas" and save.
What will happen? Answer: if you use any "key date" before 01.06.2012 in CG02 you will see the identifier "gas" on the REAL_Sub, but if you use any key date after 01.06.2012 (including 01.06.2012) you will not be able to see the identifier in cg02 any more.
Please define what do you mean by "delete the complete substance master"?
PS: use my simple example (may be on sandbox or similar system) to understand EH&S internal logic if change numbers are used. You need to use se16 !
Try this: figure out which ESTRH entry represent the REAL_Sub. Figure out by using ESTRI which identifier is linked to ESTRH (deleted or not !!): Check the content of ESTRI and may be you will understand how change numbers have "impact" on EH&S tables
Be aware of the fact that may be you can explain the effect of use of change numer in context of maintence of identifers, references etc.) but if have doubt that you will be able to explain the use of it if we talk about a VAT like density or flashpoint.
Be aware of the fact that you can use change numbers as well in maintenance of phrases. Don't combine that with cg02 activities; you will feel really unhappy after some time
Change numbers should only be used in "daily" maintenance in CG02 if you have
1.) not many users in EH&S
2.) they are all highly experienced in EH&S (they know and understand the effect of the "key date")
3.) not many processes in EH&S (e.g. DG filling etc.)
The use Change numbers in EH&S is very risky, not very transparent and hard to understand