Create web service for /POSDW/CREATE_TRANSACTIONS_EXT

Hello Experts,
In our POSDM implementation, we are trying to connect third party POS to POSDM via custom Middleware (.net application). I am trying to create a webservice for /POSDW/CREATE_TRANSACTIONS_EXT function module so that via middleware we can upload the T-log into POSDM.
While creating a web service we are getting an error "
SOAP application
"urn:sap-com:soap:runtime:application:rfc:710"
does not exist"
I have also checked the function module is RFC enabled. If anybody can put some light on how to solve this problem would be really appreciated.
Thanks
Mayank

Hi Mayank,
Use transaction ST22 in R3 (where you have created the RFC) and see what error has occoured. This will help you to solve your problem.
Since you got RFC_ERROR_SYSTEM_FAILURE exception, therefore have a look at the dev_jrfc.trc files. These files are written by JRFC and can be found in the directories j2ee/cluster/server* of the J2EE Application Server Installation.
Thanks and Regards,
Ramesh D

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     sendingSystemID          String
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It might be that after saving you get an error. This might be as the package name of one component is copied to the corresponding Java class at the very beginning (before the package declaration within the Java class). Simply delete the string here.
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In order to create the "real" web service and deploy it to the J2EE an Enterprise Application project has to be created. So create a new DC as for the EJB Module but choose as type "J2EE -> Enterprise Application".
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As soon as you implemented the business logic you can create the "real" web service. Therefore:
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Probably it can be necessary on top level "Soap Extensions" in tab "Mapping" to leave "Use Namespaces for Parameters" unchecked. For some of my web services this parameter must be checked for others not - just try.
If you can define a "New Name", "Local Name" or "Item Label" for a Soap Extension then use a name with starting upper case letter. (For Java Naming conventions most of the data type names will start with lower case letters.) Especially the method name must be renamed this way in order to stick to the PI namings.
As a last point to change here check in tab "Mapping" all "Incoming Parameters" which you specified as array. Use for those as "New Name" a different name - do not just simply change from lower case to upper case. This is necessary as on PI we need to create two levels although here only one is specified.
For any own sub-type declared as array the name within the coding should also differ from the corresponding Java Class name the type refers to.
If all this is done you can deploy the web service to the J2EE:
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     right click on "Enterprise Application" DC and choose "Development Component - Deploy"
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Create PI interface
After the web service is created successfully the PI integration can be started.
Therefore, within the Enterprise Services Builder create a data type according to the web service definition. All components defined on top-level for this data type should be declared as incoming parameter for the web service business method. Therefore it could be necessary to create some sub data types on PI first and add those to the "master" data type.
Ensure that the names of the components correspond to the names defined in the web service (see virtual interface here). Those names must exactly be the same - including lower/upper case. Also take care for the ordering of the components.
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Create PI mappings and routings
How to map (message mapping and operation mapping) from source to the web service message I wont explain here as this depends on the source message. The only important things here are:
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Create web service for /POSDW/CREATE_TRANSACTIONS_EXT

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