Lars Fosdal

Which Delphi version?

Which Platform?

Which component(s)?

What did you expect should happen?

If we have to guess what you are doing or how you do it - it is unlikely we can be of any help.

https://larsfosdal.blog/2016/04/20/how-do-i-ask-good-questions/

Online activation failed for me. Downloading the license file and inserting it "manually" worked.

16 hours ago, lisichkin_alexander said:

if not(a) or True then <<--- Error [dcc32 Error] E2015 Operator not applicable to this operand type writeln('a not or');

not(a) looks weird to me.

GetIt, DocWiki, Quality Portal are all down for me as well. Blogs are up, but really slow.

Isn't that always \\server\share + \myfolder ?

@A.M. Hoornweg Please post this as an issue on QP.

We always run with MARS=Yes.

We also follow a different pattern with regards to inserts and updates - using stored procedures to change the contents of the database.

Usually the problem is that more than one operation is attempted on the same connection at the same time.

Are you certain you are not crossing variables somewhere? In you example code, there is fdcAmman and fdcUpdateAmman ...

 

Usually a mess we create ourselves 🙂

It may be that the dead thread raising the exception was trying to use an already disposed reference in it's final moments.

I use EL, so I can't really opinionate on MadExcept.  It is very rare that it gives me no clue to the callstack for exceptions caused by dangling pointers, but when desperate, I've turned to using a FreeAndNil overload to set the pointers to a recognizable value, $DEAD0001 and so forth, and logging the line where I set the respective ptr values to at least find a hint to the context that is trying to use it. Problems like these can be a pain to find.

Another alternative would be to try with regular threads to see if the problem persists - if it doesn't, it might be that you can attribute it to something OTL specific?

10 minutes ago, Brian Evans said:

more for data extraction than full database use

Good info, Brian!

Do you .Free or FreeAndNil?
Are you using EurekaLog or MadExcept?

Does this trick have any effect?

HttpClient.SetRequestHeader('Connection', 'close');

from https://stackoverflow.com/questions/48321245/thttpclient-is-not-closing-connection-in-delphi

You can move to FireDAC while still using DBase.  I know, not your goal - but at least you would have made the first step.

https://blogs.embarcadero.com/firedac-odbc-for-paradox-and-dbase-tables/

If a REST call is in progress when you terminate - will the code hangup and close the REST related thread(s) ?

Do you stop the tasks and wait for completion of any running task before stopping the application?

1 hour ago, Tommi Prami said:

1 hour ago, Lars Fosdal said:

No locks or semaphores in CompressFile?

Yes but released in  try.. finally. I use Critical section and very short ones. 

Doesn't that mean that only ONE compression can happen at a time - i.e. serializing your use of CompressFile?
Edit: Are you reusing the same critical section in multiple locations in the code or on multiple nested levels? That could become a race condition.

 

No locks or semaphores in CompressFile?

3 minutes ago, Stefan Glienke said:

what you refer to is AOT - when .NET code runs, the runtime always JITs the code to machine code

Regular C# .NET Code transpiles to IL code. When you run, the JITer compiles the IL code to native code - but as you say - on every run.
But - You can - with limitations - compile C# .NET code to native code - using the AOT approach.
From the second link I posted:

Quote

Publishing your app as Native AOT produces an app that's self-contained and that has been ahead-of-time (AOT) compiled to native code. Native AOT apps have faster startup time and smaller memory footprints. These apps can run on machines that don't have the .NET runtime installed.

There are some elements that are still JITed - such as LINQ expressions - and there is a limit to which libs and platforms that supports AOT - but it keeps expanding from one .NET version to the next.

1 hour ago, Stefan Glienke said:

They compile down to machine instructions but not at compile time but at runtime - hence the term JIT.

It is slightly more complex than that... 
https://learn.microsoft.com/en-us/windows/uwp/dotnet-native/

https://learn.microsoft.com/en-us/dotnet/core/deploying/native-aot/?tabs=net7%2Cwindows

FreePascal's Generics support is pitiful.

It is impossible to move my Delphi code to FPC.

14 hours ago, David Heffernan said:

Seven year old bug??? 

I haven't tested it, but it certainly appears so.

Known issue: https://quality.embarcadero.com/browse/RSP-15908

Another interesting tool set:
https://platform.uno/blog/the-rise-of-c-markup-for-cross-platform-development/

Something that is often overlooked is to limit the redraw frequency. If you redraw the display on every update and there are many updates per second, you may save a lot of time on triggering the invalidate at a capped rate, i.e. not do a full redraw every time, but update once every fixed time interval.  Unless you are doing video processing - a redraw at maximum twice per second should be more than sufficient?

My interpretation:
This is (string which need to (remove) -> This is

This is (string) which (string) need to (remove) -> This is which need to