Controlling Delete Order with One-To-Many

I have a class that has six 1-M mappings. All of them have a 1-1 back reference. I would like to control the order of deletion to ensure that one of the child collections is always deleted last.
It was suggested to me to use an after-load method to call addConstraintDependencies on the parent descriptor to control the order. This method is being called (before login) but it did not change the order. I added the after-load to the parent descriptor, adding the constraint dependency of the class I want deleted last.
I also tried using "multi-table info" (in addition to the regular one-to-many mappings) but that seems to cause the valueHolder to retrieve the items from the table twice, giving me a list with "doubles" of every item.
What can I do to control the order of the deletes of the children?
Thanks,
Allen

Hi Don,
This is with reference to your comments on the following oracel forum query "http://forums.oracle.com/forums/thread.jspa?messageID=508819&#55728;&#57235;" regarding 1:M mapping insertion problem.(Same one)
Actually I also have the same kind of scenario but the data in not getting inserted to the detail table. It always gives ORA-1400 error as it is unable to populate the foreign key of parent in child table.
Can you suggest if I am missing something.
Your quick response will be appreciated.
Message was edited by:
user466708

Similar Messages

COPA - Multiple Sales Order with one wbs element. COPA does not reference

COPA - Multiple Sales Order with one wbs element. COPA does not reference of reference of sales order.
Hi All
Currently we are in process of implementation of project related to Club Service for one of the client.
Concept of this project is - there is "X" company engaged in supporting the different shared services for their client e.g. Client IBM - Shared Support Services of IBM is
u2022     IDM
u2022     Software Installation
u2022     Help Desk
u2022     Maintenance
Co.. "X' is performing these services for IBM.    So for Co. "X" - IBM is one engagement. Like this way Co. X is performing such activities for many companies e.g. microsoft, HP, ABN AMRO etc.
Objective - Get the consolidate report from COPA (Customer wise/services wise/sales order wise e.g. IBM/HelpDesk/10002/10).
We propose a solution to create a project for each engagement and with WBS element. Each WBS element of different services e.g.
Project IBM Inc. 100.100
WBS Element    100.100.IDM
WBS Element    100.100.SoftIns
WBS Element    100.100.HelpDesk
WBS Element    100.100.Maintainance
For this engagement (IBM), we are creating a sales order with line items (for services) and account assignment is WBS element. In a sales order, there may be two lines for one services.   In a particular period, there are many such sales orders for this engagement... Milestone billing/period billing is used depending upon the services rendered.
Now Cost Object will be WBS Element. So cost and revenue will posted to WBS and from this it goes to COPA. In a month of May 2009 two - sales order is booked with three different line items with account assignment is WBS element.
Sales Order Line Item No.....Item                  Account Assignment                      Revenue
10000          100     IDM      100.100.IDM              1000
10000          200     HELPDESK      100.100.HelpDesk              2000
10000          100     Maintenance      100.100.Maintainance         3000
Another Sales order booked with two different line items
10000          100      IDM     100.100.IDM          3000
10000          200      HELPDESK     100.100.HelpDesk          4000
Cost will be booked directly against WBS element.
In sales order level, there is no profitability segment, as cost object is WBS element.
Billing, revenue will be posted directly to wbs element, from this revenue and cost of sales goes to COPA.
Now in COPA,
1.There is only one line for WBS element ex. 100.100.IDM with revenue 4000 (combing both the sales order)
2.There is only one line for WBS element ex. 100.100.HelpDesk with revenue 6000 (combing both the sales order)
3.There is only one line for WBS element ex. 100.100.Maintainance with revenue 4000
In above case 1 & 2 we will not have reference of sales order and sales order line item in COPA table. There is only one line for this. So we can not have reporting to sales order level.
Is there any way by this the reference of sales order and sales order line will come in COPA for case 1 & 2.
Please help in this issue.
Regards
Abhay Dev
Ph:- 91-22-67782229
Cell:- 91-9819175185

Hi,
For these case (multiple materials with different characteristics); have you consider going to next level of WBS Elements. Meaning; lets say currently you are assigning WBS "Engineering (which is a level 2 WBS)" to all the items in SO. Instead under "Engineering" create 2 or 3 level 3 WBS Elements as E1, E2 etc and assign them 1:1 to your sales order line items. This would eliminate the exit as welll as complex development option. And also will let you get all the data in COPA and in turn you can pull to BW as well for reporting. Just a thought.
Regards
Sreekanth

Insert with one-to-many mapping

Hi,
I've got the following situation:
- an object A with a vector of object B
- I defined a one-to-many relation in the descriptor of A referencing a collection of B using indirection through valueHolderInterface, the "private owned" is also checked
- I defined a one-to-one relation in the descriptor of B referencing the object A using indirection through valueHolderInterface
- the bidirectional relationship is maintained.
I try to insert a new object A with a new object B inside. The code is as follows:
A = new A();
B = new B();
// ... set the A attribute values
// ... set the B attribute values
A.addB(B);
UnitOfWork uow = session.acquireUnitOfWork();
uow.registerNewObject(A);
uow.commit();
where addB(b) is as follows:
((java.util.Vector)bvector.getValue()).add(b);
b.setA(this);
Executing this code, the object A is inserted in the database but the object B is not. And I would like that the object B is also stored in the database. Do I really have to register it? I want to make the insert in just one transaction. Have anyone an idea? I tried a lot of different configurations and just one SQL insert order is generated by Toplink.
Thanks,
Frédéric

Hi Don,
This is with reference to your comments on the following oracel forum query "http://forums.oracle.com/forums/thread.jspa?messageID=508819&#55728;&#57235;" regarding 1:M mapping insertion problem.(Same one)
Actually I also have the same kind of scenario but the data in not getting inserted to the detail table. It always gives ORA-1400 error as it is unable to populate the foreign key of parent in child table.
Can you suggest if I am missing something.
Your quick response will be appreciated.
Message was edited by:
user466708

How to update multiple Sales Orders with one IDOC using IDOC_INPUT_ORDCHG

Hi Gurus,
Here's my scenario:
Consider there are 2 Sales Orders for same Purchase Order -
Open Quantity
Sales Order 1
Article A1
1
Sales Order 2
Article A2
1
Say if I want to change Open Quantity of both SO 1 & SO2 by dispatching 1 Quantity each for Article A1 and A2 via ORDCHG, observed that in Include LVEDBF0N, XVBAK-VBELN is checked for only 1 Sales Order.
Whether it is possible to update multiple SOs with one IDOC using IDOC_INPUT_ORDCHG?

Hi,
Check out this link, this deals with the problem you are facing.
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/802f0ed1-a17a-2c10-7db4-d515a5b047ed
Regards,
Runal

COPY CONTROL: SALES ORDER WITH REFERENCE TO QUOTATION

Hi.
We are creating a sales orders with reference to a quotation. When copying, we'd like to be able to include another new position type in the sales orders.
For example:
QUOTATION:
POSITION 10: TYPE ZTAB
SALES ORDERS:
POSITION 10: TYPE ZTAB
POSITION 20: TYPE IRSS.
Where could we place this change?. We suppose when saving the sales orders. Does anybody know how could we make this change?.
Thank you very much!.
Raú

What do you mean by position type?
Please use the language used by SAP so that it could be easily understood.
What is ZTAB & IRSS. Are they materials?
Regarding copying, this is a brief theory
In copy control, you define control data for the document flow of sales documents.
You can specify for a particular sales document type, which document type is to be assigned to copied reference documents, and which item categories or schedule line categories are to be copied.
You must also make specifications for copying requirements and data transfer, as well as quantity and value updates in document flow.
In precise, you are telling the system what data to copy from QT to sales order. It copies data from Quotation order type to Standard order type basing on settings you indicated in copying control.
System won't do anything more than copying from preceding documents and it would transfer data based on copying rules in copy control.

SSAS 2008 snowflake - dimensions with one-to-many relationship (NOT fact table) and hierarchy?

Hi, below is my data model for SSAS 2008 on snowflake schema.
Below is SQL Server DW tables:
DimStudent - StudentID [primarykey], StudentName, DateOfBirth, AddressID
DimStudentAddresses - AddressID [primarykey], StudentID [foreignkey], ddressLine1, AddressLine2, AddressType
FactEnrolment - StudentID, EnrolWeek, EnrolFees
So here FactEnrolement.StudentID is joined to DimStudent.StudentID column,
and relationship between DimStudent & DimeStudentAddresses is one to many I.e. one student can have multiple addresses like primary or secondry address.
To design snowflake schema in SSAS 2008 BIDS project :
[Question-1] how to join one-to-many dimensions (NOT fact table) Like DimStudent & DimAddresses?
[Question-2] At the end I want to have a single dimension only I.e. Student which should have both DimStudent & DimStudentAddresses tables attributes init. So I can create hierarchy from these two table into a single dimension? How
to do this?
Please reply with feedback particular to my above scenario as I refereed other MSDN forums but nothing solid I found.
Any STEP-BY-STEP guideline please. Many thanks.

Hello KM,
Have you solved this issue after refer to Bill's suggestion? Please let us know how things go.
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Elvis Long
TechNet Community Support

TopLink11 Tutorial problems with one-to-many relation

Hi,
I installed TopLink 11 and the related tutorial to work in a simple Eclipse project.
Everthing works fine except for the storing of the one-to-many relation in the database.
The tutorial works with employee, address and phone tables/classes. Plain Objects can be stored and one-to-one relations too. However when trying to store a one-to-many relation not the key of the related object (which is at that tome well known) but the object is tried to be entered
in the Logfile I find:
[TopLink Fine]: 2008.01.10 10:27:28.748--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--INSERT INTO EMPLOYEE (EMP_ID, L_NAME, F_NAME, ADDR_ID, VERSION) VALUES (?, ?, ?, ?, ?)
bind => [1501, Pascal, Blaise, 2252, 1]
[TopLink Finer]: 2008.01.10 10:27:28.748--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--commit transaction
[TopLink Finer]: 2008.01.10 10:27:28.748--UnitOfWork(14858725)--Thread(Thread[main,5,main])--end unit of work commit
[TopLink Finer]: 2008.01.10 10:27:28.748--UnitOfWork(14858725)--Thread(Thread[main,5,main])--release unit of work
[TopLink Finer]: 2008.01.10 10:27:28.748--UnitOfWork(14858725)--Thread(Thread[main,5,main])--release unit of work
[TopLink Finest]: 2008.01.10 10:27:28.748--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Register the object Employee: Blaise Pascal
[TopLink Finest]: 2008.01.10 10:27:28.748--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Execute query DoesExistQuery()
[TopLink Finer]: 2008.01.10 10:28:58.370--UnitOfWork(18511661)--Thread(Thread[main,5,main])--begin unit of work commit
[TopLink Finer]: 2008.01.10 10:28:58.370--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--begin transaction
[TopLink Finest]: 2008.01.10 10:28:58.370--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Execute query UpdateObjectQuery(Employee: Blaise Pascal)
[TopLink Finest]: 2008.01.10 10:28:58.386--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Execute query InsertObjectQuery(PhoneNumber[desk]: (603) 123-4567)
[TopLink Fine]: 2008.01.10 10:28:58.386--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--INSERT INTO PHONE (P_NUMBER, EMP_ID, AREA_CODE, TYPE) VALUES (?, ?, ?, ?)
bind => [1234567, {Employee: Blaise Pascal}, 603, desk]
[TopLink Warning]: 2008.01.10 10:28:58.511--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Local Exception Stack:
Exception [TOPLINK-4002] (Oracle TopLink - 11g Technology Preview 3 (11.1.1.0.0) (Build 071214)): oracle.toplink.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Ungültiger Spaltentyp Error Code: 17004
the highlighted section should be 1501 (the key of the employee record)
Any ideas how to fix this?
Thanks Erika

Erika,
You need to specify the other side of the relationship (on the PhoneNumber side), which is done by putting a @ManyToOne annotation on the "employee" attribute in PhoneNumber. That will cause TopLink to know that it is a relationship and not a basic mapping.
-Mike

Help with One to Many Formula

Post Author: Don
CA Forum: Formula
Hello Everyone,
I need some assistance. I have a one to many relationship...
Example...
TABLE 1
FieldName = RecordID
DATA, RecordID= 10
TABLE 2, linked one to many to RecordID in TABLE1
FieldNames = RecordID, Name, ContactType
DATA, RecordID= 10, Name= Tom, ContactType= Sales
DATA, RecordID= 10, Name= Dan, ContactType= Service
DATA, RecordID=10, Name= Jon, ContactType= Sales
What I am looking for is to create a formula that would return something that looks like this....
Sales Contact Name
Tom, Jon
So... I want to grab all the "Contact Types" of "Sales" from TABLE 2 then pass in the "Name" field from TABLE 2 and if there is more then one "Name" of the sames "Contact Type" then comma seperate it.
And... I don't want to do this in a sub report.   I do know I can make a sub report and return both values but to my knowledge the values would be on top of one another and not beside each other comma separated.
Ideas?

Post Author: Don
CA Forum: Formula
That may work using a subreport...
I think the root of this my problem is the fact I have a table relationship, left outer... one to many join. So even if I drop your suggested formula in my report I still get repeating record details with blank names where all the other contact types would be.
Ticket Number       Contact Name     Contact Type
111111                  Dan, Jim               Sales
111111                                                                 <---- where the other contact type appear
111111                                                                 <---- where the other contact type appear
I was trying to avoid having to create several subreports for each data field I need on the report. However, I think I can use your formula in a subreport to allow the data to display in a comma separated row rather then a vertical list.
I thought about suppressing but that won't work because I have other contact types I need to list.
Thank you for responding.

Select with One-to-Many and Many-to-One without repeating

Hi
I have a customer who needs a report two sides left and right, but allowing for One-to-Many and Many-to-One relationships in the one report.
A little background:-
This has do do with listings on land and buildings.
One building can be built on a few pieces of land.
Similarly, there can be several buildings on one piece of land.
What is required is a listing of buildings on the left, land on the right, but without repeating the "single line entries" either left or right.
For example Building1 is on Land1 and Land2, and Building2 and Building3 are built on Land3.
We need:-
Building1 Land1
________Land2
Building2 Land3
Building3______
The ___ just used for spacing so you get the idea ;)
Essentially - a "break by" on columns on the left and right.
The Buildings and Land are in different tables, with a link table - one row for each link.
Any ideas?
Thanks
Mike

To jitu.jk - first, this is not in SQL*Plus - its a report in APEX - second, I see no way to break on the left and the right in the same select.
Maybe there is a way.
To Etbin
This is a very inovative solution - I've tried it out and the result is:-
BUILDING LAND
_____Land 4
_____Land 3
_____Land 5
Building 2 Land 4
Building 3 Land 1
_____Land 4
Building 4 Land 4
Building 5 Land 3
_____Land 4
(The underscores I put in for spacing - not perfect but you get the idea - hard whe you write the reply in a fixed space font and it's displayed in the forum in variable space font!! ;)
9 rows selected.
This is not quite the desired result - in your list of associations, we have Building1 associated with Land 3,4, and 5.
So for Building 1 we should have:-
Building 1 Land 3
________Land 4
________Land 5..........
But your result doesn't include Building 1 at all.
The other requirement is that no building or land is ever repeated - so I came up with the concept of "groups".
Starting with one building - I find all pieces of land that are associated - listing them on the right (without repeating the building.
I then find any other buildings asociated with any of the land records that the first building was associated with.
These are listed on the left - without repeating the land records on the right.
This group is given a unique identifier of the minimum association ID (my associations have ID's).
This all done, I use the unique ID as a break column ans summarise additional columns (area, value etc) below each group.
Because of the summaries - adding area and value etc, I can't have any building or land duplicated as I would then "double count" the area, value etc.
Maybe you method can be made to work with some tweaking.
Very clever indeed - forums need great answers like this - it keeps us going.
Thanks again
Mike

Confused with one to many relationship

Hi Masters ,
Reading about one to many : i came across this
Each row in Table A can have many (zero or more)
matching rows in Table B but each row in Table B
has only one matching row in Table A.
A ZipCode can have many Students but each Student has only
one ZipCode
Theoritically this would be fine but can anyone please make tables for the above so i want to see it pratical work.

zip
(zipcode varchar2(6)
, low_street_number varchar2(10)
, high_street_number varchar2(10)
, odd_even char(1)
, city varchar2(30)
, constraint zip_pk primary key (zipcode)
student
(studentno number(10)
, firstname varchar2(30)
, lastname varchar2(30)
, zipcode varchar2(6)
, constraint zip_fk foreign key(zipcode) references zip_pk
Sybrand Bakker
Senior Oracle DBA

Move VS Windows App (Access DBS with one to many form)

I have a VS Windows App (forms connected to an Access DBS-including one to many form) and would like to have users access via our SharePoint 2001 site...
thank you.
mjschukas

Hi mjschukas,
This forum is to discuss problems of Windows Forms. Your question is related to SharePoint.
You can consider posting it in sharePoint forum(http://social.technet.microsoft.com/Forums/en-US/home?forum=sharepointdevelopmentprevious)
for supports. Thanks.
Best regards,
Youjun Tang
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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HERE to participate the survey.

How do I sort ALL my bookmarks into alphabetical order with ONE CLICK?

This functionality does not - nor has ever existed in any version of Firefox. (as far as I remember)
This question has been asked multiple times - and the answer is usually incomplete or too time consuming (especially for those of us who have over THREE THOUSAND bookmarks separated in hundreds of folders)
The only decent answer - used to be - to install an addon called SortPlaces: https://addons.mozilla.org/firefox/addon/9275 - though for some reason the developer was offended by those in control of Mozilla and has pulled all of his addons from every site that is easily accessible - the newest version of firefox has broken this add on - and Firefox has a very useless sorting system. --
Sorting your bookmarks - one folder at a time - using a right click option - that only works when you 'view -toolbars-bookmarks' (or when you right click within the bookmark menu system) is a pitiful system -
Why can't you sort it when in 'bookmarks - show all bookmarks' ?? (well you CAN sort it there - but it will revert back to its un sorted form upon closing the interface)
Why can't you export it into a json - or html - then sort using a text editor - or some other program - then re import?
With the promotion of your online bookmark sync system you would think that something as simple as SORTING would have been covered...
Other topics comparable - with answers that are not valid:
1 https://support.mozilla.org/en-US/questions/760184
cor-el suggested right clicking each folder individually - or using the sourtplaces addon (which is no longer available)
2 https://support.mozilla.org/en-US/questions/837928?as=aaq
various people suggest using the sort places add on.
3 https://support.mozilla.org/en-US/questions/752997?as=aaq
SortPlaces is mentioned again - along with a link that looks REALLY OFFICIAL - and that link also suggests using the SortPlaces - the link says its not available at mozilla but can be found elsewhere -- but the latest firefox has broken it - so its useless now...
the-edmeister suggested:
http://kb.mozillazine.org/Sorting_bookmarks_alphabetically
Not sure what happened with the developer of Sortspaces - I never used any of his addons or had any dealings with him - but he is certainly unhappy with the folks behind Firefox.
http://www.andyhalford.com/
and HOORAY for Bookmark Duplicate Detector 1.1.1 https://addons.mozilla.org/en-US/firefox/addon/bookmark-duplicate-detector/?src=search (helped me get rid of over 700 duplicate bookmarks - got me down to 3400 total; the auto remove all does not work with firefox14 but the rest of it works fine- I just had to manually push delete over and over again for a few hours...)
- and the checkCompatibility 1.3 that allows me to load out of date add ons: https://addons.mozilla.org/en-US/firefox/addon/checkcompatibility/
The CheckCompatibility allowed me to install the Sort Bookmarks add on - and it looks perfect - but will not properly function...
I hope my post helps others who are trying to sort their bookmarks - and I hope someone has an answer for some of my questions - preferably the title question... lol

I've been watching this (general) thread for years and waiting patiently for Mozilla to address it, w/out any success at all - obviously. And, no, the answers are NOT helpful to me!
I understand many people have no interest in bookmarks but clearly lots of people still use them. If you're going to have the feature that purports to sort bookmarks, for pete's sake, make it work. I'd think it would be an embarrassment to have a part of your program malfunction for so long. I mean, what are you folks? IE!?! Why don't you just ask someone to spend a couple days addressing the issue and get it straightened out? (Clearly i care enough about it but I don't code, so… I'm useless.)
For the record, a user shouldn't have to individually sort each folder within their Bookmarks folder. One should be able to pick an option that would apply to all folders. Sure, leave the ability to sort individually but add an "apply to all" feature to the mother folder. Then, find a way to have it automatically maintain that status, whatever is selected. Doesn't sound like that difficult a task, given all the other great things you guys and girls do all the time! That's my ¢.
By the way, I'm using a MB Pro 4,1 (early 2008), OS 10.6.8, and Firefox 19.0 beta. Thanks for listening to my bitching.
- cheers

Activating multiple iPhones with one or many Apple IDs?

I'm wondering whether its possible to activate an iPhone with an iTunes Store account that is not the one the phone will be used with. I'm centrally activating a dozen iPhones and loading a configuration profile onto them but I need to know if I'll need to take the staffs Apple ID's off them in order to do that?
Equally they're all going to be on a company plan but I don't want them to be able to sync their phones and have access to the same account that was used to pay for the contract, otherwise they could go nuts on the company card! (I know there are some safeguards but it only takes one to read the password upside-down off the bosses desk and then...)
Is it possible to complete an activation without logging into an iTunes Store account and if not then how do you avoid either:
a) getting all the staff's personal information (and that is not something I would give out to anyone, they could post a silly question!)
b) giving the staff access to a single company account. I don't even know whether its allowed to activate a dozen phones on one Apple ID
I have an iPhone myself but I can't remember at what point I had to put in my information and the videos and tutorials I've seen either don't specify or are completely useless (the O2 one is my personal favourite http://shop.o2.co.uk/FAQ?category=iPhone&question=FAQHOW_DO_I_ACTIVATE_MYIPHONE given that you could re-write that whole page as just, "use iTunes")
Also, am I missing something basic, I thought this would at least be in the Enterprise activation guide as I'm sure I can't be the first one to ask this question?
Any help/thoughts appreciated

Ah excellent, so I can activate the phones on the company account and hand them over to each member of staff to sync with their own iTunes accounts. So I'll also be able to get the free apps on the company account and then give them over to the staff to sync with their own iTunes accounts. It means I'll have to update them manually but that's manageable at this scale.
Does anyone know if the ability to pre-load non-commercial apps is going to be a feature of the configuration utility at any point? Or at least have a post installation script which uses their account to download the apps (with appropriate dialogues requesting permission or whatever) so that you can ensure app deployment without knowing their Apple ID's?
Must remember to delete that initial text message too, if there is still one, as that'll have the account login details!
I've already got the iPhone Configuration Utility configured to set them up with Passcodes but I've not applied any restrictions, parental control wise. After all there's no point in having the iPhone if you can't have fun with all the features.
A second question but related, if you take the iPhone backup file and save it on another machine (having swapped it out for one that may already have been there) and then plug the phone in, will it sync? Does it still work if the phone backup is encrypted?
I'm thinking of backup solutions and the inevitable hardware failure that'll take the iPhone backup with it. I'll probably be trying to ChronoSync or RSync the User/Home/Library/Application Support/MobileSync/Backup folder to a server location where it'll be rolled into our regular backup procedure but will I be able to restore that backup to another machine, the .../MobileSync/ folder and get the iPhone to work again? How have others handled this?

Controlling multiple instruments with one VI

I have 5 instruments that I need to control simutaneously. Right now, each is controlled separately by its own VI, all of which run in LabVIEW 7.1. I would like to consolidate control into one panel instead of 5. I have seen examples of libraries that contain multiple sub-VIs controlled by a main VI, but I cannot figure out how data is passed between them, or how to create a library from my existing VIs. Is there a way to do this?

For a simplistic answer, you just have to place your existing VIs into a new top level main VI. In order to pass data from a subVI to a mian, you wire the controls/indicators on the subVI to the subVI's connector pane. These is really basic LabVIEw knowledge and if you don't know how to do this, then you should probably spend some time learning LabVIEW basics. A great starting point is at http://www.ni.com/academic/lv_training/how_learn_lv.htm.
With 7.1, a library is an llb file and you really don't need to use one of these. They can be handy for distributing an application but should not be used during development. Just keep your VIs in folders.

Can I control two Macs with one keyboard & mouse simultaneously?

I'm presently the operator and head audio tech for a major Off-Broadway show. I'm running the show on Ableton Live 6 through a Mac Mini, using a MOTU 828mkIII as the Firewire audio interface to the console. "Show control" is basically straight music playback, plus arming and disarming loops, triggering sound FX cues, and stopping and starting playback. The show has been exceedingly stable, no real reason to worry - but the fact that I don't have a redundant backup system concerns me. Theoretically, I can use our Denon CD players to run the show off of discs I've burned, but it's only viable for me because I know the show; a sub running the show would be up the creek - and if we hit a snag and run out of loops, forget it. Furthermore, those of you who've worked with Live know that in a performance based/show control situation, you can remain in an audio loop indefinitely, without any worry of a CD running out of prerecorded loops. (This is a specific reason why we're using Ableton for this show - the music can keep "vamping" until automation and rigging give me the clear to proceed.)
Considering that I'll be taking some time off this summer, I don't want this to be a concern for my sub(s), so I've charged myself with the task of building a redundant backup. Problem is, I'm not sure how to do it.
What I've been looking at is a dual Ableton Live/Mac Mini/Firewire interface system. Basically, to duplicate what's running the show presently, and have it running in tandem while the main playback system goes to the house - but for both to be controlled by only one mouse, keyboard and screen, so there's no delay in the event of a crash. If one fails, I send the audio from the backup into the theatre. There would be no disruption of playback, except for the operator`s response time in switching to the backup`s audio output.
Software like Synergy and Teleport let me share a single keyboard, mouse, and screen over two or more computers - +but only control one computer at a time+. And I've looked for KVM switches and USB "splitters" but they also seem to be toggle devices between one or another computer - which leads me to think I may have to network the two...
Any ideas are appreciated, even the obvious ones, as I may have overlooked some or assumed some to be out of the question.
That`s basically it - *simultaneous realtime* control of two computers from one keyboard and mouse. Both Minis performing the same task at the same time.
Is there software/hardware that can do it, or can I network the backup as a "slave" that mimics the master?
Thanks.

Perhaps you could setup a parallel processing network:
http://daugerresearch.com/pooch/
The website was last updated 5 days ago according to Google. Hopefully their server will be back up soon. I noticed it wasn't connecting when I tried.

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