What could cause my log_modules to stop working? Once I noticed that I wasn't getting IO in console anymore, I did commands manually to try to trace. As far as I can tell, n2o understands the proper module and the module is exporting the log_modules/0 function. When I bypass wf to n2o_io or n2o_log I get response. It is only when wf functions are called that it does not pass log_modules. Currently, in .applist, n2o is set to load before all of my own applications but I could not define in *.app.src for all of the apps which use it without getting a mad error on plan.