Webmaster tool crawl errors

Hey everyone, I have a question regarding google webmaster tool, I recently reorganized the layout on of my websites and i noticed there a lot of crawl errors from the sitemap.xml.gz file. So I have tried to fix this by removing this file but the crawl error still shows in the webmaster tool. Is this normal? Well it ever be removed and what can you do to fix crawl errors expect fix the broken links on your sites?

Cheers