求助各位大牛，我在用stata14软件做数据分析，结果显示异质性强：Heterogeneity chi-squared = 194.43 (d.f. = 10) p = 0.000
  I-squared (variation in SMD attributable to heterogeneity) =  94.9%
  Test of SMD=0 : z=  11.09 p = 0.000
我再用随机效应显著性检验时一直显示r(198)错误，编程见下面
metareg _ES,wsse( _seES ) eform

option eform not allowed
r(198);
请问是出现了什么问题了呢？求解，谢谢！