Webservice initialization problem.

 When modifying SaleLineItemRederer (class responsible for displaying items on transaction window in POS application) and adding new webservice call:

 EnterpriseWebserviceOperation enterpriseWebseviceOperation = new EnterpriseWebserviceOperation();

I'm getting following error:

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: oracle/retail/stores/enterpriseconnection/manager/EnterpriseWebserviceOperation

at com.ch.pos.ui.beans.ChSaleLineItemRenderer.setData(ChSaleLineItemRenderer.java:987)

at oracle.retail.stores.pos.ui.beans.AbstractListRenderer.getListCellRendererComponent(AbstractListRenderer.java:326)

at com.ch.pos.ui.beans.ChSaleLineItemRenderer.getListCellRendererComponent(ChSaleLineItemRenderer.java:1262)

at javax.swing.plaf.basic.BasicListUI.updateLayoutState(BasicListUI.java:1154)

at javax.swing.plaf.basic.BasicListUI.maybeUpdateLayoutState(BasicListUI.java:1104)

at javax.swing.plaf.basic.BasicListUI.getPreferredSize(BasicListUI.java:355)

at javax.swing.JComponent.getPreferredSize(JComponent.java:1618)