BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TClientDataSet / Locked SafeArray problem          BorlandTalk.com Forum Index -> Delphi Databases (dbExpress) View previous topic :: View next topic   Author Message Jan-Christian Lupander Guest Posted: Sat Jan 10, 2004 10:48 am    Post subject: TClientDataSet / Locked SafeArray problem Hi, Having recently "upgraded" from Delphi6 Enterprise (Educational) to Delphi7 Professional I'm running up against a real showstopper: I can't get TClientDataSet to work! When I try to open them, even in basic testapplications, I get "Variant or safe array locked". The same applications run ok under Delphi 6, which I still have installed. I tried a Delphi 7 repair-installation, no change. I installed Delphi 7 on a friends Compaq desktop, no problems! (My normal computer is a Dell laptop) My BDE- and Advantage-based applications work without any problems in both the Delphi6 and -7 environments without any problems. So I either have a hardware related problem or something is askew in the software environment in my laptop (Dell Inspiron 5000e, 700MHz, 512M of memory, lots of free diskspace, Win XP) Any suggestions on solutions or where I should start to look? Thanks in advance! Jan-Christian Back to top Bill Todd (TeamB) Guest Posted: Sat Jan 10, 2004 2:00 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem On Sat, 10 Jan 2004 11:48:41 +0100, "Jan-Christian Lupander" <janskip.thislupander (AT) pp (DOT) inet.fi> wrote: Quote: Any suggestions on solutions or where I should start to look? Change your path so that the D7 directories are searched before the D6 directories. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Jan-Christian Lupander Guest Posted: Sat Jan 10, 2004 5:13 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem D7 was already in the first and second entries in the path environmental varible. Removing D6 altogether from the path didn't help. I cannot find any other paths where both D6 and D7 directories appear. BTW, wouldn't a switching of places in the path, if successful, result in D6 having the problems I'm now trying to get fixed in D7? Jan-Christian "Bill Todd (TeamB)" <no (AT) no (DOT) com> skrev i meddelandet news:hb1000188k2a71udorrcrqr276qi46nk87 (AT) 4ax (DOT) com... Quote: On Sat, 10 Jan 2004 11:48:41 +0100, "Jan-Christian Lupander" [email]janskip.thislupander (AT) pp (DOT) inet.fi[/email]> wrote: Any suggestions on solutions or where I should start to look? Change your path so that the D7 directories are searched before the D6 directories. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Bill Todd (TeamB) Guest Posted: Sat Jan 10, 2004 7:07 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem On Sat, 10 Jan 2004 18:13:21 +0100, "Jan-Christian Lupander" <janskip.thislupander (AT) pp (DOT) inet.fi> wrote: Quote: BTW, wouldn't a switching of places in the path, if successful, result in D6 having the problems I'm now trying to get fixed in D7? It should not. Search your hard drive and remove any copies of MIDAS.DLL whose version does not match the version that came with D7. Also, make sure you have all of the updates from the D7 registered users area installed. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Jan-Christian Lupander Guest Posted: Sat Jan 10, 2004 8:22 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem Finally some progress! I deleted all the D6 midas.dlls floating around and now the error when opening a CDS is "Error loading MIDAS.DLL". Midas.dll is located in WINNTSystem32. I tried with it copied to the same folder where my testprogram is but the error didn't change. I don't have the D7 updates but they are missing from the computer where my programs work too, and D7 on both units comes from the same CD. Anyway, tomorrow I'll get the updates. Jan-Christian "Bill Todd (TeamB)" <no (AT) no (DOT) com> skrev i meddelandet news:9aj00092u5u31prv9j6kon3f6o6l2sams9 (AT) 4ax (DOT) com... Quote: On Sat, 10 Jan 2004 18:13:21 +0100, "Jan-Christian Lupander" [email]janskip.thislupander (AT) pp (DOT) inet.fi[/email]> wrote: BTW, wouldn't a switching of places in the path, if successful, result in D6 having the problems I'm now trying to get fixed in D7? It should not. Search your hard drive and remove any copies of MIDAS.DLL whose version does not match the version that came with D7. Also, make sure you have all of the updates from the D7 registered users area installed. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Bill Todd (TeamB) Guest Posted: Sat Jan 10, 2004 9:04 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem Register MIDAS.DLL with regsvr32.exe and everything should work. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Jan-Christian Lupander Guest Posted: Sun Jan 11, 2004 8:54 am    Post subject: Re: TClientDataSet / Locked SafeArray problem That did it! Many thanks for your help! No way I could have solved it by myself! Which brings up a related question: Midas.dll has bugged me before, in Advantage-based applications when I added graphic display of results, to pick one example. Originally I tought Midas was used only in multitiered applications but obviously that is not the case. Can you give me a pointer where I can learn more about Midas in this "everyday" environment? Thanks again! Jan-Christian "Bill Todd (TeamB)" <no (AT) no (DOT) com> skrev i meddelandet news:46q000puj0biagkjuqb688jmlho4rbt7tp (AT) 4ax (DOT) com... Quote: Register MIDAS.DLL with regsvr32.exe and everything should work. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Bill Todd (TeamB) Guest Posted: Sun Jan 11, 2004 2:43 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem Quote: Which brings up a related question: Midas.dll has bugged me before, in Advantage-based applications when I added graphic display of results, to pick one example. Originally I tought Midas was used only in multitiered applications but obviously that is not the MIDAS.DLL is required whenever you use a ClientDataSet. If you do not want to distribute MIDAS.DLL just add the MidasLib unit to the uses clause of any form or data module in your application (I use the main form). Quote: case. Can you give me a pointer where I can learn more about Midas in this "everyday" environment? As I said, it is not Midas (which is now called DataSnap) but rather TClientDataSet that requires MIDAS.DLL. I am not sure exactly what you are looking form but there are papers on using ClientDataSet on the Borland Web site. Search using Google. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Jan-Christian Lupander Guest Posted: Mon Jan 12, 2004 8:04 am    Post subject: Re: TClientDataSet / Locked SafeArray problem It was the use/need of Midas.dll in "non Midas/DataSnap" applications I was interested in. In a previous case I found out the hard way that it was necessary to distribute Midas.dll in the .exe folder of an application in order to get the result graphics to work, now I learn I needed to register it with regsrvr32 in order for a ClientDataSet application to work (or include MidasLib in the uses clause). It gives a very unsecure feeling to have "Midas" pop up in what for me, so far, has been unexpected places. I wondered if something had been written on the subject. I have read a lot about the use of TClientDataSet but cannot remember having seen this need of Midas.dll/MidasLib mentioned. Perhaps I have just been blind!... But, Ok, now I have some kind of base to start from. Thanks again! Jan-Christian "Bill Todd (TeamB)" <no (AT) no (DOT) com> skrev i meddelandet news:r1o200l6dmr99kiu2iaqfggukhro1mii8f (AT) 4ax (DOT) com... Quote: Which brings up a related question: Midas.dll has bugged me before, in Advantage-based applications when I added graphic display of results, to pick one example. Originally I tought Midas was used only in multitiered applications but obviously that is not the MIDAS.DLL is required whenever you use a ClientDataSet. If you do not want to distribute MIDAS.DLL just add the MidasLib unit to the uses clause of any form or data module in your application (I use the main form). case. Can you give me a pointer where I can learn more about Midas in this "everyday" environment? As I said, it is not Midas (which is now called DataSnap) but rather TClientDataSet that requires MIDAS.DLL. I am not sure exactly what you are looking form but there are papers on using ClientDataSet on the Borland Web site. Search using Google. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Bill Todd (TeamB) Guest Posted: Mon Jan 12, 2004 12:58 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem The _only_ time you need to distribute MIDAS.DLL is if your application uses TClientDataSet or if it is a DataSnap (formerly Midas) server. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Jan-Christian Lupander Guest Posted: Mon Jan 12, 2004 6:23 pm    Post subject: Re: TClientDataSet / Locked SafeArray problem Yes, right you are, of course! My previous problemcase with an application needing midas.dll in order to show QuickReport output as graphics, which I blamed on the TeeGraphics component used, proved on closer inspection to be caused by my own introduction of a ClientDataSet on one of the forms involved. Thanks Bill, for all the help! Jan-Christian "Bill Todd (TeamB)" <no (AT) no (DOT) com> skrev i meddelandet news:ue650097dnenp2lq7ofnn3f46peo3d6u6s (AT) 4ax (DOT) com... Quote: The _only_ time you need to distribute MIDAS.DLL is if your application uses TClientDataSet or if it is a DataSnap (formerly Midas) server. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Databases (dbExpress) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.