Error in double(n.nodes) : object 'n.nodes' not found - when running pagerank

[SergiPicart]

Copied original message from Ben:
Hi Sergio,

I'm trying a pagerank analysis in FELLA (R code and input data are attached) and I'm getting an error message.

When I try:
enrich(..., method = 'pagerank', approx = "simulation", niter=10000)

I'm getting:
Running PageRank...
Estimating p-values by simulation.
Using pagerank matrix. Damping factor will be the one with which the database was built
Error in double(n.nodes) : object 'n.nodes' not found
In addition: Warning message:
In defineCompounds(compounds = compounds, compoundsBackground = compoundsBackground, :
Some compounds were introduced as affected but they do not belong to the background. These compounds will be excluded from the analysis. Use 'getExcluded' to see them.