主题：[求助]帮忙看看

Dim jb As New SQLJoinTableBuilder("流向查询表","客户表")
Dim Cols1() As String ={"品名","规格","医疗机构"}
Dim Cols2() As String ={"品名","规格","医疗机构"}
jb.Addtable("客户表",Cols1,"流向表",cols2)
jb.AddCols("所属区域","医院等级","客户","联系方式","开piao时间","{客户表}.医疗机构","{客户表}.品种","{客户表}.规格","单价","数量")
jb.AddExp("金额","数量*单价")
jb.Build()
MainTable = Tables("流向查询表")

执行时出现“至少有一个参数没有被指定值”，求助！