STATA小白一只，初次使用STATA，想把财务三大报表，根据公司代码和年份用Merge横向合并，我是这样输入滴，
insheet using "D:\04-论文\EXCEL处理后\利润表2.csv", clear(62 vars, 22,332 obs)

. save "D:\04-论文\利润表.dta", replace
file D:\04-论文\利润表.dta saved

. insheet using "D:\04-论文\EXCEL处理后\资产负债表3.csv", clear
(149 vars, 22,332 obs)

.merge m:1 Stkcd Year using "D:\04-论文\利润表.dta"
variable Year not found
r(111);

. merge 1:m Stkcd Year using "D:\04-论文\利润表.dta"
variable Year not found
r(111);


多次试了都不行，实在不知道哪儿错了，求指导