* installing *source* package 'rwty' ...
** this is package 'rwty' version '1.0.3'
** using staged installation
** R
** data
** inst
** byte-compile and prepare package for lazy loading
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'igraph'
Calls: <Anonymous> ... loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart
Execution halted
ERROR: lazy loading failed for package 'rwty'
* removing 'd:/RCompile/CRANincoming/R-devel/lib/rwty'
* restoring previous 'd:/RCompile/CRANincoming/R-devel/lib/rwty'