rjags conflicts with igraph

#Start a new R session with --vanilla;
 
library(igraph) # version 0.6-2
n1 <- read.graph ('network.txt', format="ncol", directed=F, name=T); 

a1 <- get.adjacency="" n1="" pre="" type="both">
if (is.connected(n1, mode="weak")){ 
    #do something 
} 
 
library(rjags) #version 3.5
data(LINE)
LINE$recompile() #example analysis included in rjags
 
#Start a new R session with --vanilla, and the following line runs smoothly;
 
library(rjags) #version 3.5
data(LINE)
LINE$recompile()

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inline rjags

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