I might need this for some really old stuff, so here is a reminder: Unspecified Error in Delphi 2007 on Windows 8 | ACMer.
It does work on Windows 7: Problem installing Delphi 2007 on Windows 7 64 Bit Enterprise – Stack Overflow.
–jeroen
Archive for the ‘Delphi’ Category
Reminder to self: Unspecified Error in Delphi 2007 on Windows 8 (via: ACMer)
Posted by jpluimers on 2013/08/15
Posted in Delphi, Delphi 2007, Development, Power User, Software Development, Windows, Windows 8 | Leave a Comment »
reminiscence of the past: DPMI (DOS Protected Mode Interface)
Posted by jpluimers on 2013/08/12
While researching some other historic information about Delphi, I bumped into this thread: New DPMI host – delphi.
If is a small thread describing what kinds and versions of DPMI hosts were available to run Turbo Pascal based programs.
DPMI stands DOS Protected Mode Interface: a way for real mode DOS programs to access protected mode features (mainly memory above the 1 megabyte barrier).
I had plainly forgotten that the DPMI host shipped with Delphi 1, and wasn’t aware you could have a 32-bit DPMI host at all.
Some other memory related abbreviations from that era: Read the rest of this entry »
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Posted in Borland Pascal, Delphi, Delphi 1, Development, Object Pascal, Pascal, Software Development, Turbo Pascal | 2 Comments »
When your Delphi XE Browsing Path has been destroyed Ken White to the rescue (via: Stack Overflow)
Posted by jpluimers on 2013/08/11
Something overwrote the Browsing Path of my Delphi XE installation.
Symptoms:
- When debugging a project in “use debug DCUs” mode, the IDE cannot find RTL, VCL and Indy units.
- When you type `System` in a source file, then press `Ctrl+Enter`, the IDE cannot find the source code to the `System.pas` unit.
It was faster to examine the Delphi XE Library registry settings from Ken White than comparing them with a backup or a fresh Delphi XE install.
Now it works fine…
–jeroen
via: Delphi can’t find System.dcu; what should the default path settings be? – Stack Overflow.
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Posted in About, Delphi, Delphi XE, Development, Software Development | Tagged: software, stack overflow, technology | 2 Comments »
Reminder to self: Delphi XE2 x64 debugging on Windows 8 is a no go, you get [Error] Disconnected session
Posted by jpluimers on 2013/08/09
Just found out this the hard way, glad I found it soon which prevented me from doing like Ondrej Kelle – Google+ – Wasted a few hours with this….:
Debugging 64 bit Delphi applications with Delphi XE2 on Windows 8 does not work
Problem: Debugging a 64 bit Delphi application using Delphi XE2 with Windows 8 results in the error Disconnected session.
Solution: Windows 8 is not a supported platform for versions of Delphi prior to Delphi XE3. To get debugger support for 64 bit applications on Windows 8, you must get Delphi XE3. If you are upgrade sensitive, Embarcadero recommends you get Support and Maintenance along with your next purchase. Support and Maintenance guarantees you all updates for 1 year and gets you 3 support incidents in addition.
The proposed solution is to upgrade to at lease Delphi XE3, but this project is not ready to upgrade just yet.
Anybody with a real workaround (apart from downgrading to Windows 7)?
–jeroen
via Error: Disconnected session.
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Posted in Delphi, Delphi XE2, Development, Software Development | 4 Comments »
.NET/C#: some starting posts on the `yield` keyword.
Posted by jpluimers on 2013/08/08
Peter Leslie Morris asked if Delphi already incorporates the `yield` keyword that C# had introduced in C# 2.
Delphi doesn’t, but for the people interested what it does in C#:
Basically `yield` is syntactic sugar to make it a lot easier to write methods that return enumerators of some sort.
It delays (hence the yield keyword) execution until the enumerator as actually being used.
It is one of the hardest C# things to master (it is the most complicated transformation in the compiler, followed by anonymous methods – well maybe with the exception of async/await), but it can be very useful.
VB.NET doesn’t have it either (thanks André!) has it too, but and also has iterator blocks.
Some start posts on yield:
- What is the yield keyword used for in C#? – Stack Overflow.
- Behind the scenes of the C# yield keyword « Struggles by Lars C..
–jeroen
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Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Delphi, Development, Software Development | 10 Comments »
delphi – Winrollback/DeepFreeze How these softwares work? – Stack Overflow
Posted by jpluimers on 2013/08/06
StackOverflow user opcOde wrote something interesting:
Writing device drivers in delphi is hard to impossible.
Here is an attempt to write drivers in delphi.
It is funny to see the link pointing to the DelphiBasics site: Advanced Delphi Driver Development Kit – DelphiBasics.
On my list of things to remember: might come in very useful one day (:
Note that opcOde also has an interesting blog: opc0de | just another enthusiastic coder.
–jeroen
via delphi – Winrollback/DeepFreeze How these softwares work? – Stack Overflow.
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Posted in Delphi, Delphi 2010, Delphi 7, Development, Software Development | 9 Comments »
Reminiscence of the past: Delphi I/O error 131
Posted by jpluimers on 2013/08/06
I was called by a client that didn’t want to do maintenance on an old Delphi application, but wanted to get dir of an I/O Error 131:
I/O Error 131: ERROR_NEGATIVE_SEEK
MessageText: An attempt was made to move the file pointer before the beginning of the file.
Tough luck: psychic powers told me someone is using an unsigned 32-bit integer to access a file using traditional style Assign/Reset/Seek/Read/Close patterns that Delphi kept as intrinsic routines for Turbo Pascal backward compatibility, and that file has grown over 2 gigabyte in size.
I quickly found an import file had grown over the 2 gigabyte, so this was indeed the case.
The original developers didn’t do the file access using the 64-bit Seek/Position of the TStream descendant TFileStream.
Too bad, as now someone has to dig through the mothballs to find the sources (if they survived 3 different version control system switches), create a working development environment, and fix the bug.
Another instance where technical debt in IT raises its ugly head and the compound interest is really expensive.
–jeroen
via: erikmartin.com – IO Errors in Delphi.
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Posted in Conference Topics, Conferences, Delphi, Delphi 5, Development, Event, Software Development, Technical Debt | 14 Comments »
Delphi: Embarcadero Summer School lesson 6 Q&A (Powerful multi-tier applications with DataSnap.)
Posted by jpluimers on 2013/08/01
Lesson 6 of the Embarcadero Mobile Development Summer School was titled Powerful multi-tier applications with DataSnap.
Download of the video will be at streaming.embarcadero.com/summerschool2013.
The Twitter coverage is at Twitter / Search – #embtdd.
Here is the Q&A chat for that session: Read the rest of this entry »
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Posted in Delphi, Delphi XE4, Development, Software Development | Leave a Comment »
Conversion between absolute and relative paths in Delphi – Stack Overflow
Posted by jpluimers on 2013/07/30
A while ago, I needed routines to work with absolute and relative paths on Windows.
These links were very useful:
- The Delphi TPath.IsDriveRooted function (I think it was introduced in Delphi 2010) serves as a IsPathAbsolute function
- Conversion between absolute and relative paths in Delphi – Stack Overflow showing how to use the Windows API functions PathRelativePathTo and PathCanonicalize functions declared in the ShLwApi unit to create AbsToRel and RelToAbs functions.
Thanks Andreas Rejbrand and David Heffernan for the last two!
–jeroen
via: Conversion between absolute and relative paths in Delphi – Stack Overflow.
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Posted in Delphi, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Development, Software Development | 4 Comments »
Delphi: do not do “if (not DirectoryExists(path)) then ForceDirectories(path))”
Posted by jpluimers on 2013/07/26
During code reviews, I often see people do things like this:
if (not DirectoryExists(Path)) then ForceDirectories(Path))
or this:
if (not TDirectory.Exists(Path)) then TDirectory.CreateDirectory((Path))
Half a year ago, I wrote about .NET/C#: do not do “if (!Directory.Exists(path)) Directory.CreateDirectory(path))”. Read the rest of this entry »
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Posted in Delphi, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Development, Software Development | 16 Comments »
The Wiert Corner - irregular stream of stuff 