differentiate the rich client and ep using the menu items name.
always remember to do INCREMENTAL CIL every time you modify any of workflow classses

public void submit(Args _args)
{
    WorkflowComment         note = "";
    WorkflowSubmitDialog    workflowSubmitDialog;
    WorkflowCorrelationId   workflowCorrelationId;
    recId                   recId;
    workflowTypeName        workflowTypeName = workflowtypestr("TIDEmploymentLeave");
    WorkflowComment         initialNote = "";
    HcmEmploymentLeave      HcmEmploymentLeave;
    FormDataSource          HcmEmploymentLeave_ds;
    EPWorkflowControlContext workflowControlContext;
    str                     menuItemName = _args.menuItemName();


    //from rich client
    if(menuItemName == menuitemactionstr(TIDEmploymentLeaveSubmitMenuItem) || menuItemName == menuitemActionStr(HRSLeaveCreditSubmitMenuItem))
    {
        // Workflow is starting from the Windows client. This can be determined
        // because the menu item for submitting the workflow on the Windows
        // client was chosen by the user.

        // Opens the submit to workflow dialog.
        workflowSubmitDialog = WorkflowSubmitDialog::construct(_args.caller().getActiveWorkflowConfiguration());
        workflowSubmitDialog.run();

        if (workflowSubmitDialog.parmIsClosedOK())
        {
            // Find what record from the Work Orders table is being submitted to workflow.
            recId = _args.record().RecId;

            // Get comments from the submit to workflow dialog.
            initialNote = workflowSubmitDialog.parmWorkflowComment();

            try
            {
                // Update the record in the FCMWorkOrders table that is being submitted to workflow.
                // The record is moved to the 'submitted' state.
                ttsBegin;
                HcmEmploymentLeave = _args.record();
                HcmEmploymentLeave.selectForUpdate(true);
                HcmEmploymentLeave.Status = HRSLeaveStatus::Submitted;
                HcmEmploymentLeave.update();
                // Activate the workflow.
                workflowCorrelationId = Workflow::activateFromWorkflowType(workflowTypeName, recId, initialNote, NoYes::No);

                 ttsCommit;

                // Updates the workflow button to diplay Actions instead of Submit.
                _args.caller().updateWorkflowControls();
            }

            catch(exception::Error)
            {
                info("Error on workflow activation.");
            }
        }
    }
    //from EP
    else
    {
         // Workflow is starting from Enterprise Portal.

         // Retrieve the workflow controller context from the arguments passed in.
         workflowControlContext = _args.caller();

         // Find what record from the Work Orders table is being submitted to workflow.
         recId = _args.record().RecId;

         // Get comments from the submit to workflow dialog.
         initialNote = workflowControlContext.getWorkflowComment();

        try
        {
            ttsBegin;
            workflowCorrelationId = Workflow::activateFromWorkflowType(workflowTypeName, recId, initialNote, NoYes::Yes);
            HcmEmploymentLeave = _args.record();
            HcmEmploymentLeave.selectForUpdate(true);
            HcmEmploymentLeave.Status = HRSLeaveStatus::Submitted;
            HcmEmploymentLeave.update();
            ttsCommit;
        }
        catch(exception::Error)
        {
            info("Error on workflow activation.");
        }
    }
}