stata同样的数据和代码自己的电脑无法运行，显示invalid'''，但换一台电脑运行正常，这是怎么回事呢

// Example using panel data
webuse nlswork2
gen wage = exp(ln_wage)

* Obtain lag-order selection statistics
pvarsoc wage hours, maxlag(3) pvaropts(instl(1/4))

* Estimate panel VAR
pvar wage hours, instl(1/4)
pvar wage hours, instl(1/4) gmmstyle

* Check stability condition
pvarstable, graph

* Compute FEVD
pvarfevd, mc(200) save("fevd.dta")

* Compute IRF
pvarirf, mc(200) oirf byopt(yrescale)