Delivery of components in SAP with SapBobsCOM

I hava a winform program with SapBobsCom and I need the system to deliver raw material via the application to Sap but I throw the following error :'' If one of the lines is referenced to production, then all lines should be referenced [IGE1.BaseEntry][line: 1].'', and change the visor by the lineNum and vice versa, how does the problem solve?