Getting Error while calling XBP Function Module via SAP.net connector

When calling XBP Function Modules via SAP .NET connector, you may encounter session-related errors. This typically happens because XBP functions require maintaining a consistent session context throughout the execution.

Solution Using JCoContext

Note that you need to execute function calls in a single session, so you have to wrap your logic into JCoContext. The JCoContext ensures that all function calls within the block use the same SAP session, which is essential for XBP operations that depend on session state.

Example Implementation

Try using the below method −

try {
    JCoContext.begin(destination);
    try {
        // your XBP function calls here
        // Execute your XBP operations
        JCoFunction xbpFunction = destination.getRepository().getFunction("XBP_JOB_SUBMIT");
        
        // Set parameters for XBP function
        xbpFunction.getImportParameterList().setValue("JOBNAME", "MY_JOB");
        xbpFunction.getImportParameterList().setValue("JOBCLASS", "A");
        
        // Execute the function
        xbpFunction.execute(destination);
        
        // Commit the transaction if successful
        JCoFunction commitFunction = destination.getRepository().getFunction("BAPI_TRANSACTION_COMMIT");
        commitFunction.execute(destination);
        
    } catch(AbapException ex) {
        // Handle ABAP exceptions and rollback
        JCoFunction rollbackFunction = destination.getRepository().getFunction("BAPI_TRANSACTION_ROLLBACK");
        rollbackFunction.execute(destination);
        System.err.println("ABAP Exception: " + ex.getMessage());
    }
} catch(JCoException ex) {
    System.err.println("JCo Exception: " + ex.getMessage());
} finally {
    JCoContext.end(destination);
}

Key Points

The solution involves three critical steps −

• Begin Context: JCoContext.begin(destination) starts a new session context
• Execute Functions: All XBP function calls must happen within this context
• End Context: JCoContext.end(destination) in the finally block ensures proper cleanup

Always include transaction commit or rollback functions depending on the success or failure of your XBP operations. This approach resolves most session-related errors when working with XBP Function Modules.