Running examples in 'netassoc-Ex.R' failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: plot_netassoc_network
> ### Title: Plots species association network
> ### Aliases: plot_netassoc_network
> 
> ### ** Examples
> 
> # generate random data
> set.seed(5)
> nsp <- 10
> nsi <- 5
> m_obs <- floor(matrix(rgamma(nsp*nsi,shape=5),ncol=nsi,nrow=nsp))
> m_nul <- floor(matrix(rexp(nsp*nsi,rate=0.05),ncol=nsi,nrow=nsp))
> 
> n <- make_netassoc_network(m_obs, m_nul, numnulls=100, plot=TRUE,alpha=0.5)
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Calculating standardized effect sizes...
Adjusting p-values for multiple comparisons... Building network...
Error in layout_with_fr(list(10, TRUE, c(1, 2, 2, 4, 5, 9), c(5, 4, 9,  : 
  At core/layout/fruchterman_reingold.c:401 : Weights must be positive for Fruchterman-Reingold layout. Invalid value
Calls: make_netassoc_network ... layout.fruchterman.reingold -> do_call -> eval -> eval -> layout_with_fr
Execution halted