Zoran Bonuš

Setting SQL forces the FDQuery to close. My guess is that in combination with pooled connection, it might release the connection too. Have you tried setting the SQL before starting the transaction or even setting the FDQuery.Connection ? You might try to debug and trace into the line where you set the SQL to see what after-effects it has in your context.

Blogpost about the update: https://blogs.embarcadero.com/introducing-the-brand-new-konopka-signature-vcl-controls-8/#What_is_new_in_Konopka_Signature_Controls_8

And KSVC 8.0 has just been released https://blogs.embarcadero.com/introducing-the-brand-new-konopka-signature-vcl-controls-8/#What_is_new_in_Konopka_Signature_Controls_8

KSVC 8.0 released https://blogs.embarcadero.com/introducing-the-brand-new-konopka-signature-vcl-controls-8/#What_is_new_in_Konopka_Signature_Controls_8

The latest skia4delphi (beta) removes the need to deploy the .dll, as far as I inderstand it:

I guess to help the compiler a liittle bit, as explained here: https://blog.marcocantu.com/blog/2022-december-suggestions-help-delphi-compiler.html

In such situations I use JSONReader instead: https://docwiki.embarcadero.com/CodeExamples/Sydney/en/RTL.JSONReader It's less convenient, but much more efficient when "sequential" processing of the json is possible.

I use F4 (Run to cursor) in situations like this ...to skip debugging parts i don't need to debug, but still stops when the program reaches the selected line.

Have you considered https://winsoft.sk/acpusb.htm (commercial)?

You may try the TNumberBox, available in the newer versions of Delphi. https://docwiki.embarcadero.com/RADStudio/Sydney/en/Using_VCL_TNumberBox_Control

Have you considered creating LXC containers, instead of VMs? Should be less resource-hungry, easier to setup...and only slightly less secure (if set as not priviliged, which is the default).

How about testing .Visible in OnActivate? Or starting a timer in OnShow and execute your code few ms later, when the form is already visible.

How about app tehtering? Ready to use components, multi-platform, ip/bluetooth app to app communication https://docwiki.embarcadero.com/RADStudio/Alexandria/en/Using_App_Tethering

If you already use database of other data, I would go with the images in DB. Another form.of storage means also another thing to take care of backups, accessibility, security, etc.

Or you can use other 3rd party db components (commercial like unidac) with Delphi Pro.