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author's profile photo Former Member
Former Member

Error in calling RFC function module


I have created one simple WebDynpro application in which i am calling a RFC function module. it was working fine then i had to make changes in interface of function module. After making changes i deleted and recreated the RFC model and readjusted all context mappings. But now when i try to run the application i gives an error

"Could not create JCO connection with logical system :default".

Can any one tell me what could be its reason.



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  • author's profile photo Former Member
    Former Member
    Posted on Feb 27, 2004 at 10:43 PM


    After deleting the model, please make sure that you have deleted the model packages before regenerating the model again. This has to be done manually. I have posted another topic "Web Dynpro Models" regarding this. I have been told that NetWeaver Developer Studio 2.0.4 has the model regeneration facility without loosing the context bindings.

    Another solution to do a Model Transplanation(**) with out loosing the binding is as below.

    1. Create a dummy project

    2. Create a model with same "name" and "package name" as that of the model to be replaced.Save the meta data.

    3. Go to the project workspace using windows explorer

    4. Copy and paste the newly created model folder(package) over the same model package in the "To be replaced models" package

    5.Use the Net Weaver developer studio and rebuild original application.

    6.Make necessary binding for fields that is adjusted in the RFC

    7. If needed, rename the model node/attribute in the context.

    Thanks and Regards,

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    • Former Member Former Member

      Hi Komal,

      Unfortunately there is no migration guide from Sneak I to Sneak II available. There is one migration guide for customers and partners on the service marketplace available, describing the migration from 6.30 (which is nearly Sneak I) to 6.40 (which is nearly Sneak II):

      -> Documentation & More -> Migration Guides

      Hope that helps!