销售退货单下推应收单保存报错

环境：V5.0

问题：销售退货单下推生成应收单不能保存，报错如截图所示

堆栈信息：

[{"operation":"AR_receivable.MBIClick.tbSplitSave"}]
发生时间：11:30:33
错误来源： mscorlib
错误信息：Input string was not in a correct format.
===================================================
调用堆栈：
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseDecimal(String value, NumberStyles options, NumberFormatInfo numfmt)
at System.Convert.ToDecimal(String value, IFormatProvider provider)
at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
at System.Data.SqlClient.SqlParameter.CoerceValue(Object value, MetaType destinationType)
错误数据： System.Collections.ListDictionaryInternal