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Thanks for the reply.
Within a few hours of the error, Googlebot visited, then removed 3 of 10 URLs. I fixed the site immediately and did a resubmit of the sitemap, thinking this might call Googlebot back to be able to find the URLs that were on error.
It's been about 3 weeks now with no update. The other pages are still ranking as they did before.
I guess I have seen other sites with server problems get removed then back in a few days, so perhaps more patience is in order.
Server logs show googlebot stopping by daily, but the last HOME page crawl reported on sitemaps was 9/17. BTW, the home page was one of those URLs that were removed.
Web crawl diagnostics show no errors.