As an example, I set a manual recording via TWP for 11am-11:01am to be repeated every Monday.

Right now my TiVo has no guide info for next Monday, which from what you say is what causes the error.

I only Setup all these manual recording SP's a couple of days ago, because I am going overseas for a few months and wanted to block known repeats of existing SP's to save space. So I just set it to record 1 minute on basic quality, keep only one episode and delete after 1 day.

TWP did not have a problem with these entries until I updated. But I guess the problem would have come up if I restarted TWP or rebooted even with the old version of TWP.

Peter.