Change JCO references

Hello ,
We changed to a new portal server. I'm trying to change the model JCO references to the new ones unsuccessfully...
I need to change WD_RFC_METADATA_DEST to WD_RFC_METADATA_DEST2 .
Does any one have any idea except from create new model??
thanks,
Michal.

Michal,
To change a Model Object's logical system follow these steps.
To change Logical system for RFC metadata,
           Select Dictionaries node under your Web Dynpro DC.
           Select the model node for relevant model object.
           Select 'Properties' tab. You can see the name of logical system here.
           Logical System name can be changed here.
To change Logical system for Model instances,
           Open 'Models' node under your Web Dynpro DC.
           Open the relevant Model Object.
           Double click any of subordinate model classes and select 'Properties' tab.
           Under 'Model settings', overwrite the name of logical system.
Then follow these steps to remove old references.
Right click on your Web Dynpro DC and select 'Properties'.
Select 'Web Dynpro References' in Pop up window.
Select tab 'JCo References'
Remove old JCo destination names from here.
That should get the JCo destination names changed.
Hope it helps,
Vishwas.

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Hi
We had created a few models with the 2 - default (WD_model..) JCO references, now is it possible to change the references to a different custom /name without re-importing the models again ?
The issue for us is very critical because, we need to maintain unique reference for all the models under each application for the same server.
please let us know asap.
thanks
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Hi Sathya & Ravi,
If you want to change only the JCO Destinations that your model refers to, then its very much possible to change their names.
But if the model stucture has got changed , then you should reimport that.
I guess, trying out the following steps for changing the names will work out for you.
1) For Medata Dest--
a) Click on the local disctionary stucture that has been generated by importing the model.
b) Click on the properties tab on the bottom right corner.There you shoulb be able to change the Metadata dest name.
2) For Application data Dest-
a) Right Click on model classes (model_Input & model_output) & then click EDIT.
b) Same Way, on the bottom right corner , Change whichever proerty you want to alter inlcuding the Dest Name.
In this way, you can mainten unique JCO references for all the models you are using in your project.
ReBudild & Redploy the entire project . Create the New JCOs Destinations in the content Admin & happily run your application.
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Hi All
I have read an article which explains the method to change the JCO reference of model but when I tried to follow the same steps in CE 7.1 i am not able to find the category "Model Settings" (on clicking model edit option) containing the property "modelInstance_defaultLogicalSystem" which needs to be changed.
So is there any other method that needs to be followed in CE 7.1 to change the JCO reference? or should i delete and recreate the models with new JCO reference.
Any suggestions would be highly helpful.
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Ashwin Kulkarni.

Hi Ashwin,
I guess you are not opening the models node. Open the models node shown in the web dynpro explorer.
---local Development [project1]
----Web Dynpro
----Application
----Model
--Model1 <<<<----Click Here and select properties tab
----Model Classes
----Component Interfaces
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----Dictionary
----Resources
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I guess this will solve your problem.
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Hi experts,
I m having a pretty weird problem about JCO References.
I was using WD_MODELDATA_DEST as my reference and then changed it to WD_MODELDATA_DEST_CATERING but after deploying the DC and then i try to retrieve data, i get the following error:
Could not create JCOClientConnection for logical System: WD_MODELDATA_DEST - Model: class com.diagonal.sd.msmeal.model.SpecialMealModel. Please assure that you have configured the RFC connections and/or logical system name properly for this model!
The strange thing is that i have already changed the logical system name to WD_MODELDATA_DEST_CATERING but the error still shows the old one. Even after a full restart, there is no difference. So i got no clue what is wrong since this should be a pretty straighforward configuration.
FYI, the way i changed the logical system name is as follows:
Under webdynpro perspective, right click on the root of the DC project and select properties and under webdynpro refereces i selected JCO references. After i did that i rebuilt the project and deploy.
Thanks in advance.
Best Regards,
Daniel

Hi Daniel,
Check out this blog from Bertram Ganz. It may help you.
/people/bertram.ganz/blog/2006/01/27/web-dynpro-adaptive-rfc--how-to-change-logical-system-names-after-model-import
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Hello all,
is there an API to programmatically change the JCOs instead of using the content administrator. I often have to switch the underlying R3 system and so dealing with the content administrator is sometimes a little bit monotonous.
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volker

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Well the only way to do what you are looking at is
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Steps :
If you want to change only the JCO Destinations that your model refers to, then its very much possible to change their names.
But if the model stucture has got changed , then you should reimport that.
I guess, trying out the following steps for changing the names will work out for you.
1) For Medata Dest--
a) Click on the local disctionary stucture that has been generated by importing the model.
b) Click on the properties tab on the bottom right corner.There you shoulb be able to change the Metadata dest name.
2) For Application data Dest-
a) Right Click on model classes (model_Input & model_output) & then click EDIT.
b) Same Way, on the bottom right corner , Change whichever proerty you want to alter inlcuding the Dest Name.
In this way, you can mainten unique JCO references for all the models you are using in your project.
ReBudild & Redploy the entire project . Create the New JCOs Destinations in the content Admin & happily run your application.
Let me know if that helps you.
regards
ravi

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Attachments:
cluster_color_change.vi ‏11 KB

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