EAccessViolation when switching stands

[stevejordi]

Was debugging my app and got several EAccessVIolation errors when switching Frames.
Looks like it's TSubjectStand that causes this.
The WizardSimpleProject demo provided behaves like this and I use the same behavior in my app.
Note: the EAccessViolation appears only in debug mode, not in release mode. It makes debugging harder.

Compile it and run it with debugger.
When you pass the first frame (Enter 1) and click the StepButton you get
Project WizardSimpleProject.exe raised exception class $C0000005 with message 'access violation at 0x008e7845: read of address 0x00000004'.

Click Continue
Project WizardSimpleProject.exe raised exception class EAccessViolation with message 'Access violation at address 008E7845 in module 'WizardSimpleProject.exe'. Read of address 00000004'.

Then Frame2 is presented. Type 2 and StepButton to switch to Frame3, again the same EAccessViolation
Project WizardSimpleProject.exe raised exception class EAccessViolation with message 'Access violation at address 008E7845 in module 'WizardSimpleProject.exe'. Read of address 00000004'.
and
Project WizardSimpleProject.exe raised exception class EAccessViolation with message 'Access violation at address 008E7845 in module 'WizardSimpleProject.exe'. Read of address 802A8ADF'.

Then Fram3 is presented.
FinishButton comes back to the initial view without error.

Looks like the frame is manipulated before being fully initialized?

[andrea-magni]

Hi @stevejordi , thanks for pointing this out.
Now should be fixed, let me know if everything is fine, thanks!

[stevejordi]

Just removed the previous version and installed this one. It continues to have the problem.
1st error
2nd error

Again, appears only when debugging from the IDE. The exe file seems to be fine even if in Debug instead of Release target.

[andrea-magni]

Hi, weird. Would you please tell me:

• Delphi version (11?)
• Target Platform you are addressing (Win32?)

Thanks

[stevejordi]

Sure, sorry.
Yes, Delphi version 11.
Target Win32-bit for debugging.