Adaptive RFC problem-unable to fetch data.

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Dear experts,

I am porting a webdynpro application from a sandbox server to the develpment server.The application talks to six different functional modules via JCO connections.Out of the six , two of them are custom modules.The problem is that the application is not able to retrieve the details from one of the two custom modules.Rest all are working fine.I have created the same JCO destinations as the sandbox server.The two funtional modules are also copied from the sandbox R/3 to the development R/3.Also the webdynpro code is the same.

When i execute the faulty FM in the backend , its working fine .However the application is not able to retrieve the data from it.I tried isolating the FM and creating a test application based on the FM.There also its not giving any data.When i re-imported it to the test project it did give some delta warnings.I suspect something wrong with FM. But don't know what is wrong.

Any help will be appreciated.

Thanks,

Karambir Singh