请教：为什么我的EXCEL文件已经转换为xml格式还是导入不成功呢？把变量名balance改为var4还是不行？

balance invalid name
( balance is invalid variable name; renaming to var4)
data type of Excel column not consistent
specifying the missing option will import inconsistent values as missing data
while the allstring option will import all as strings
file not Stata format
r(610);