This is a known problem with the new Sheets and creating PDF's. The bug is here:
https://code.google.com/p/google-apps-script-issues/issues/detail?id=3579
Question
This code used to run fine for over a year now. It's a simple convert to pdf then put it in a folder.
var pdf = model.getAs("application/pdf");
var file = DocsList.createFile(pdf).addToFolder(foldersave);
All of a sudden:
We're sorry, no servers are currently available. Please wait a bit and try again.
Now on every run. Bombs on the 2nd line. Not 1st.
Solution
This is a known problem with the new Sheets and creating PDF's. The bug is here:
https://code.google.com/p/google-apps-script-issues/issues/detail?id=3579