ORA-01008: 并非所有变量都已关联

各位大虾
    修改的时候一直出现这个问题，帮忙看下~~~~
    代码如下
sql.append(" update TB_INF_MODELTESTINFO set C_EMPOID=?"+",")
.append(" C_OPERATETIME=?"+",")
.append(" C_OPERATOR=?"+",")
.append(" C_DATE=?"+",")
.append(" C_SUMMARIZE=?"+",")
.append(" C_MARK=?"+",")
.append(" C_UNITIDEA=?"+",")
.append(" C_COMMITTEEIDEA=?"+",")
.append(" C_GROUPIDEA=?"+",")
.append(" C_MODEDUTYID=?")
.append(
" where C_OID_MODELTESTINFO=?");
try {
java.sql.PreparedStatement state = this.getSession().connection().prepareStatement(sql.toString());
state.setLong(1, vo.getEmpID());
state.setTimestamp(2, new java.sql.Timestamp(curDate.getTime()));
state.setLong(3, curEmpID);
state.setTimestamp(4, new java.sql.Timestamp(vo.getDate().getTime()));
state.setString(5, vo.getSummarize());
state.setInt(6, vo.getMark());
state.setString(7, vo.getUnitIdea().getCode());
state.setString(8, vo.getCommIdea().getCode());
state.setString(9, vo.getGroupIdea());
state.setLong(10, vo.getModelDutyID());
state.setLong(11, vo.getOid());

state.executeUpdate(sql.toString());