r - Creating graphs where the nodes are images gives error cex + offset : non-numeric argument to binary operator -

while running below code

 # sample adjacency matrix:        set.seed(1)        adj <- matrix(sample(0:1, 10^2, true, prob = c(0.8, 0.2)), 10, 10)         # run qgraph:        qgraph(adj, images = file, labels = false, borders = false)      ## "**error in cex + offset : non-numeric argument binary operator**" 

while running above sample code, above quoted error m using r 3.0.0 , qgraph version latest 1 i.e qgraph_1.2.2

i need work further 

ah seems created bug latest update. fix soon. these kind of questions regarding package best sent package maintainers directly instead of asking them here.