All errors has been corrected vs All errors have been corrected

Some examples from the web:

• All errors has been corrected
• Please correct the following error An error has occurred during processing.
• MSG Stores all error messages in memory.
• Application starts scanning thoroughly and fixes all errors associated with it.
• Formatting resolves almost all errors of a storage device.
• At that time you may encounter error message An unknown error has occurred.
• Errors at the end of the output may not be meaningful or relevant once the first error has been corrected.
• Now obviously, an error has occurred.
• An error has been made here.
• You must telephone them, and say an error has been made.
• An error has occurred, please try again later.
• An error has occurred: the Web service is not responding.
• A serious error has occurred while eMule was writing data to a.part.met file.
• Sorry, an error has occurred. We apologise for the inconvenience.
• The Exceptional Way In more recent programming environments an alternative way of dealing with errors has developed.
• MediaWiki:Dberrortextcl A database query syntax error has occurred.
• An error has occurred in the script on this page.
• An unknown error has occurred. Please try again later.
• Otherwise, a double bit error has occurred.
• This error has since been corrected.
• Otherwise, suppose a single bit error has occurred.

Some examples from the web:

• All errors have been corrected
• Now you can be sure that you computer has been thoroughly cleaned and all the PC errors have been fixed.
• We have planned for this time for many years, and there is no margin for error as all possibilities have been carefully examined.
• This second edition provides many updates including: A trial version and introduction to the Super Lattice Solver software that supersedes the author's older Real Options Analysis Toolkit software (all bugs and computational errors have been fixed and verified).
• EuropeAid should, in the context of its planned review of its overall control strategy, develop a key indicator of the estimated financial impact of the uncorrected errors after all controls have been implemented;
• MSG Stores all error messages in memory.
• Application starts scanning thoroughly and fixes all errors associated with it.
• Formatting resolves almost all errors of a storage device.
• Error in Background Synchronization Errors have been detected in Outlook.PST file.
• All errors on faith arise from non science and non knowledge of its nature.
• I Mean, They Weren't All Errors, But...
• It is fully capable of eliminating all errors from Outlook 2010 and other versions.
• Write all error messages to a file
• This button lets you delete all errors in the log.
• All errors and accidents shall be documented and investigated in order to identify system problems for correction.
• All error messages from that request will be sent to this TCP connection.
• Eusing Free Registry Cleaner scans, detects and repairs all errors and invalid entries.
• Supporters of molecular nanotechnology frequently claim that no significant errors have been discovered in Nanosystems since 1992.
• With the help of the censor records these errors have been corrected.
• Recently, errors have occurred during use of KENWOOD Music Editor Light.
• He shows that all these errors have evident marks of Judaistic origin.