安装了pvar2，运行readme文件，到这一步就进行不下去，不知道该怎么解决，求赐教。
文件命令如下：
/* NOTE
This example uses follows that in the official Stata suite of time-series VAR packages
estimated using the beta panel VAR suite.
*/
webuse lutkepohl2, clear
  gen id = 1
xtset id qtr
  global var dln_inv dln_inc dln_consump
* Lag-order selection
varsoc  $var
pvarsoc $var
* VAR estimation
var  $var
  estimates store estvar
pvar2 $var, fod lags(2)
  estimates store estpvar
estimates table estvar estpvar, se
* VAR stability
estimates restore estvar
  varstable, graph
estimates restore   estpvar
  pvarstable, graph
* Granger-causality
vargranger, est(estvar)  
pvargranger, est(estpvar)
* IRF estimation
estimates restore estvar
  tempname irfv irfvset
    irf create `irfv', step(10) set(`irfvset', replace)
  irf graph oirf, byopts(yrescale)
  
pvarirf, oirf porder($var) iter(100) dots step(10)