Story Category: Development

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“No mapping for the Unicode character exists in the target multi-byte code page”

jpluimers jpluimers Usually when I see this error [Wayback] “No mapping for the Unicode character exists in the target multi-byte code page” – Google Search, it is in legacy code that uses string buffers where decoding or… … Read more 4 years ago in .NET, Base64, C++, Delphi, Development, Encoding, Software Development, Unicode 0

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delphi – Is it possible to define {$IFDEF} for more than one directive at once? – Stack Overflow

jpluimers jpluimers [WayBack] delphi – Is it possible to define {$IFDEF} for more than one directive at once? – Stack Overflow: use the {$IF Defined(xxx)} directive which allows boolean expressions like: {$IF Defined(xxx) OR Defined(yyy)} {$IF Defined(xxx)… … Read more 4 years ago in Delphi, Delphi 6, Development, Software Development 0

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“Delphi” “Data provider or other service returned an E_FAIL status” “NVARCHAR” – Google Search

jpluimers jpluimers For my link archive: [Archive.is] “Delphi” “Data provider or other service returned an E_FAIL status” “NVARCHAR” – Google Search In this case it was while reading data. Cause yet unknown, as over time the error… … Read more 4 years ago in Delphi, Development, Software Development 0

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Too bad the Delphi IDE does not find the formatter settings when searching for “Margin” or “Right”, despite the setting is named “Right margin”

jpluimers jpluimers IDEs drive me nuts, including the Delphi IDE. Searching for Margin or Setting only reveals the margin and gutter setting, not the formatter settings. So you have to remember this is in the “Formatter”, especially… … Read more 4 years ago in Delphi, Development, Software Development 0

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ODAC: calling SYS.DBMS_SESSION.SET_NLS failing with ORA-06550/PLS-00103

jpluimers jpluimers Do not call SYS.DBMS_SESSION.SET_NLS with an instance of the [Archive.is] TOraStoredProc Class, as under the hood, it will translate the call to this: Class:Ora.TOraStoredProc;Component:sprSetNls;Flag:tfQPrepare,Text:Prepare: begin SYS.DBMS_SESSION.SET_NLS(:PARAM, :VALUE); end; :PARAM(VARCHAR[22],IN)=’NLS_NUMERIC_CHARACTERS’ :VALUE(VARCHAR[4],IN)=”.,” The above is a translation… … Read more 4 years ago in Database Development, Delphi, Development, OracleDB, Software Development 0

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ODAC undocumented exception ‘Need Oracle 8 Call Interface’

jpluimers jpluimers I got this when taking over maintenance of some legacy code that called a stored procedure in a : ————————— Debugger Exception Notification ————————— Project LegacyProject.exe raised exception class Exception with message ‘Need Oracle 8… … Read more 4 years ago in Database Development, Delphi, Development, OracleDB, Software Development 0

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Delphi: When porting really old code from versions that did not have .dproj files, watch your .dfg and .dof files

jpluimers jpluimers I have been bitten by this a few times too much, so time to write it down: When porting old Delphi code from the Delphi 7 and older era, the options were stored .dof (options)… … Read more 4 years ago in Delphi, Development, Software Development 0

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Delphi: .dproj TargetedPlatforms bit flags in main PropertyGroup, and Platform values in other elements/attributes

jpluimers jpluimers For cleanup of .dproj files, I want to know the bit flags that TargetPlatforms can have. TL;DR: .dproj content management in Delphi is a mess For future reference empiric values for the flags that build… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development 0

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Delphi: some notes on HModule while tracking down an access violation in TRegGroups.UnregisterModuleClasses

jpluimers jpluimers Too bad the whole mechanism involving TRegGroups.UnregisterModuleClasses is not documented anywhere It is the underlying storage to support TClassFinder, which was introduced in Delphi 6, documented on-line in Delphi 2007, documented slightly in Delphi 2009,… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, History, Software Development 0

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Delphi: Passing build variables to batch files; I think the easiest is to use environment variables

jpluimers jpluimers A long time ago, I wrote about Delphi prebuild/prelink/postbuild events. In practice, especially that you cannot inherit build events, then add new ones (), it is convenient to put all you need in a script,… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development 0

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c++ – DLL Load Library – Error Code 126 – Stack Overflow: use Process Monitor, search for the first NAME NOT FOUND

jpluimers jpluimers In addition to [WayBack] c++ – DLL Load Library – Error Code 126 – Stack Overflow while debugging LoadLibrary error 126 Windows dll error 126 can have many root causes. The most useful methods I… … Read more 4 years ago in Delphi, Development, Software Development, Windows Development 0

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Devart ODAC product versions (Oracle Data Access Components History)

jpluimers jpluimers ODAC version history is confusing wheres [WayBack] Oracle Data Access Components – FAQ talks about version 6.00, [WayBack] Oracle Data Access Components History talks about version 10.x.y. The history page is correct. –jeroen … Read more 4 years ago in Delphi, Development, Software Development 0