Error A Call To An Os Function Failed

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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up “A call to an OS function failed” when loading Windows-1252 XML file up vote 1 down vote favorite Edit: The http://answers.microsoft.com/en-us/windows/forum/windows_other-update/call-to-os-function-failed/163ab6b3-d57f-4291-8bbf-1f750ee014e7 error was indeed in the handling; parseError also fails ans reveals the real error; see follow-up question for that error. Old question: Somehow, sometimes the code below generates an exception when loading XML using the msxml unit in Delphi XE. It fails on Windows XP Professional x86 SP3 using MSXML6 and Windows 7 Ultimate x64 SP1 using MSXML6. procedure TXMLEOSErrorTestCase.Test; var XmlDocument: IXMLDOMDocument3; XmlFileName: string; begin XmlDocument := CoFreeThreadedDOMDocument60.Create(); XmlFileName := TPath.Combine(TPath.GetDirectoryName(ParamStr(0)), '1-Normal.xml'); if http://stackoverflow.com/questions/4340162/a-call-to-an-os-function-failed-when-loading-windows-1252-xml-file not XmlDocument.load(XmlFileName) then RaiseLastOSError(); end; This error occurs during the XmlDocument.load method: EOSError at $00423B2D A call to an OS function failed I trimmed the XML down to the XML found below. This is the hex dump of the XML file: 000000: 3C 3F 78 6D 6C 20 76 65 72 73 69 6F 6E 20 3D 20 < 000030: 52 4F 57 20 43 69 74 79 3D 22 E0 22 2F 3E 0D 0A ROW City="."/>.. This is the XML: Why does the error occur? (The XML loads perfectly fine in .NET and other environments not using MSXML6). --jeroen delphi delphi-xe msxml6 eoserror share|improve this question edited Dec 3 '10 at 13:41 asked Dec 2 '10 at 21:30 Jeroen Wiert Pluimers 18.9k435111 1 Does the error really occur during the load method, or does the exception you've quoted actually occur because you called RaiseLastOSError? I suspect the latter. –Rob Kennedy Dec 3 '10 at 4:34 add a comment| 1 Answer 1 active oldest votes up vote 6 down vote acce

for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get https://www.experts-exchange.com/questions/26596216/a-call-to-an-os-function-failed.html Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers https://community.hpe.com/t5/Quality-Center-ALM-Practitioners/Error-popup-quot-A-call-to-an-OS-function-failed-quot/td-p/5168966 Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > a call to an os function failed Want to Advertise Here? Solved a call to an os function failed Posted on 2010-11-05 Delphi Editors IDEs 2 Verified Solutions 6 Comments 2,126 Views Last Modified: 2012-05-10 I have just started getting an error "a call a call to an os function failed" when I create a new application in the Delphi 7 IDE by clicking File->New->Application. The only way to get rid of this error is to close Delphi. Opening an existing project seems to work OK. Can anyone tell me how to fix this please? Using Delphi7 Build 8.1. Windows 7 Peter 0 Question by:peterharris Facebook Twitter LinkedIn Google LVL 24 Active 2 days ago Best Solution a call to byjimyX Did you install or uninstall any component or package recently ? I have had similar behavior when I installed a component (i.e. the message). Go to Solution 6 Comments LVL 24 Overall: Level 24 Delphi 21 Editors IDEs 3 Message Active 2 days ago Accepted Solution by:jimyX2010-11-05 Did you install or uninstall any component or package recently ? I have had similar behavior when I installed a component (i.e. the message). 0 Message Author Comment by:peterharris2010-11-06 Yes I Installed MyDAC components. However I thought this could be the problem so I uninstalled it again and the problem persists. Peter 0 LVL 2 Overall: Level 2 Delphi 2 Message Assisted Solution by:kambiz2010-11-06 It seems MyDAC is not installed properly. Select "Components > Install Packages..." from Delphi menu, and remove every package related to MyDAC. 0 Message Author Closing Comment by:peterharris2010-11-06 I tried removing MyDAC but it made no difference. As luck would have it I had exported a copy of my Delphi registry a few days ago to set up a copy of Delphi on a VM so I removed my Delphi registry key and restored the old one and that has fixed it. I will try re-installing MyDAC and see if the problem happe

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