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Delphi Error A Call To An Os Function Failed

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A Call To An Os Function Failed Winscp

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 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 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

Paul Herber's Products » Register: Call to OS function failed? « previous next » Print Pages: [1] Go Down Author Topic: Register: Call to OS function failed? (Read 12119 times) 0 Members and 1 Guest are viewing this topic. Nikolay Hero Member Posts: 549 Register: Call to OS function failed? « on: December 09, 2010, 12:43:35 AM » The registration of Visio Super Utilities does not seem to work on Windows 7 x64? Even http://stackoverflow.com/questions/4340162/a-call-to-an-os-function-failed-when-loading-windows-1252-xml-file if you run Visio as Administrator, i.e. UAC is off. Visio 2007 Prof.It works fine on XP though. Please consider fixing Logged Nikolay Belyh, http://unmanagedvisio.com Paul Herber Global Moderator Hero Member Posts: 2348 Re: Register: Call to OS function failed? « Reply #1 on: December 09, 2010, 03:50:47 AM » Hi Nikolay, this is a problem I've heard http://visguy.com/vgforum/index.php?topic=2316.0 about occasionally. Nobody seems to know what causes it, Googling for the problem brings up all sorts of ideas. Start the registry editor, go to keyHKEY_CURRENT_USER\sandrila_vsu.ini\RegistrationKeyand create a key called "Key". Right-click -> Modifyand paste in the registration key.Please let me know if you have any problem. Logged Engineering, business and software stencils and applications for Visio - http://www.paulherber.co.uk/ Nikolay Hero Member Posts: 549 Re: Register: Call to OS function failed? « Reply #2 on: December 09, 2010, 04:31:37 AM » Hi Paul,The registration itself was successful (i.e. the key value was successfully written by addon itself), it was just this odd window about "OS function failed" was shown.Thanks, Nickolay Logged Nikolay Belyh, http://unmanagedvisio.com Paul Herber Global Moderator Hero Member Posts: 2348 Re: Register: Call to OS function failed? « Reply #3 on: December 09, 2010, 04:39:31 AM » Hi Nikolay, maybe 2% or so of users have reported this problem, naturally I can't reproduce it here! I tried sending debug versions to various customers trying to find where th

no problem for a while. Suddenly in design time we can not actually view a form, it pops up a dialog that mentions "A call to an OS function failed", but when I run it the form run time, it http://www.delphigroups.info/2/8/648943.html has no problem. Some news groups, I have seen in Russian languages and chinese languages, they https://www.devexpress.com/Support/Center/Question/Details/B149837 seem to get the same problem but I can not interpret how they have resolved it and why they get it. Is there any documented reason why I should get this? I would be happy to submit the code if anyone could help. Vince Constantine Yannakopoulos Delphi Developer 2003-11-04 06:50:02 PM Re:"A call to an OS function failed" Author := "Vincent Farah"; | a call | We have written an internal date time control and this has been | working no problem for a while. Suddenly in design time we can't | actually view a form, it pops up a dialog that mentions "A call to an | OS function failed", but when I run it the form run time, it has no | problem. Start with debugging the design-time package. In the menu choose Run/Parameters and in Host Application specify delphi32.exe (full path). Then a call to run the package like any exe. In the second instance of delphi try to open the form and hopefully the de{*word*81} of the first instance will stop at the offending api function. HTH -- Constantine Vincent Farah Delphi Developer 2003-11-04 07:27:07 PM Re:"A call to an OS function failed" Thanks Constantine! In actual fact I have already done this but I think it is an IDE problem because it comes and goes. It is so random that when I tried to do what you suggested, I couldn't get it to raise the error. It then dissappears for a week and then a week/day later we can not actually get into forms in design time. And some times all it takes is a recompile or something unrelated to science to get it working. Thanks for the suggestion but I had already tried to do it this way to no avail. Vince "Constantine Yannakopoulos" writes: Quote Author := "Vincent Farah"; | | We have written an internal date time control and this has been | working no problem for a while. Suddenly in design time we can't | actually view a form, it pops up a dialog that mentions "A call to an | OS function failed", but when I run it the form run time, it has no | problem. Start with debugging the design-time package. In the menu choose Run/Parameters and in Host Application specify delphi32.exe (full path). The

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