I have updated to R version 2.9. I also have R version 2.7 running on the
same box. I get the following error in R 2.9; the command goes through
without any errors in R 2.7.

Would appreciate any feedback.

Raghu

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library(MatchIt)
data(lalonde)
library(Zelig)

m.out0 <- matchit(treat ~ age + educ + black + hispan + nodegree + married +
re74 + re75, method = "nearest",  data = lalonde)


I > z.out0 <- zelig(re78 ~ treat + age + educ + black + hispan + nodegree +
married + re74 + re75, data = match.data(m.out0),
+ model = "ls")
Error in zelig.default(re78 ~ treat + age + educ + black + hispan + nodegree
+  :
  no slot "call" in the result

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