MSCA: IssueTrxPage - UtilFns.convert_uom error

error: no suitable method found for convert_uom(Connection,String,String,Object,String,String,String,String,String)

/* 1202 */       double d = UtilFns.convert_uom(connection, this.m_orgid, getItemFld().getItemID(), getLotQuantityVector().elementAt(b), "", getUomFld().getUomCode(), "", getItemFld().getPrimaryUOM(), "");

                     ^

  method UtilFns.convert_uom(Connection,String,String,String,String,String,String,String,String,String) is not applicable

   (actual and formal argument lists differ in length)

  method UtilFns.convert_uom(Connection,String,String,String,String,String,String,String,String) is not applicable

   (actual argument Object cannot be converted to String by method invocation conversion)

IssueTrxPage.java:937: error: incompatible types

/* 1218 */       str = getLotQuantityVector().elementAt(b);

                               ^

 required: String

 found:  Object