Crawl errors are still shown after fixed

[sws1]

Fixed long ago "title too long" and some 404 errors, but still keep on showing on error statistics

[Linda-Vassily]

On Google Webmaster Tools or Moz?
On WMT, you can just mark things you fixed as fixed, and they will go away immediately and won't come back unless Google sees them again. For Moz, you should just have to wait till the next crawl.

[CleverPhD]

WMT is slow as heck to have those things go away.  it may take 3 months to roll off.  FYI, if there is a 404 error and it is supposed to be a 404, do not mark as fixed.  Otherwise Google will think you "fixed" the 404 back to a 200, recrawl and then put the 404 back in the GWT errors.   Just let the 404s roll off over time.