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IDProjectCategoryView StatusLast Update
0006433JEDI VCL00 JVCL Componentspublic2019-04-27 15:43
ReporterMilan BacikAssigned Tojfudickar 
Status resolvedResolutionfixed 
Product Version3.47 
Target VersionFixed in Version 
Summary0006433: TJvCheckedComboBox crash in destructor
DescriptionTJvCheckedComboBox crash when on MDIChild form. It need to be poped up and focused(just after clicked some checkbox). When in this moment form close, TJvCheckedComboBox crashed with this exception: EInvalidopearation with message 'Control 'JvCheckedComboBox1' has no parent window'.
Additional InformationAtached simple example in C++ Builder 2010. Just open child form with button. Than open popup in combo and click any checkbox. Now wait for timer which close form. Btw. In my real application form is closed by hitting Esc, which somehow bypased closing poppup first and is catched by button with ModalResult = mrCancel.
TagsNo tags attached.


2015-08-21 12:28 (8,932 bytes)

2015-09-14 16:14 (64,339 bytes)


2015-09-14 16:17

administrator   ~0021202

I have attached your sample along with Delphi files which makes for easier debugging.

To me this is an issue in the VCL and have reported it here:


2019-04-26 20:47

reporter   ~0021754

According to Embarcadero QP this is fixed in Rio and I ran the Delphi demo provided without crash in Rio Update 1.

I clicked the button, got the child form, opened the combo box dropdown and selected a car manufacturer. Waited until the MDI form was closed, closed the program and got no crash at all.

=> looks like this is fixed


2019-04-27 15:43

developer   ~0021768

Fixed in Rio

Issue History

Date Modified Username Field Change
2015-08-21 12:28 Milan Bacik New Issue
2015-08-21 12:28 Milan Bacik File Added:
2015-09-14 11:27 obones Status new => acknowledged
2015-09-14 16:14 obones File Added:
2015-09-14 16:17 obones Note Added: 0021202
2015-09-14 16:17 obones Status acknowledged => confirmed
2019-04-26 20:47 mh Note Added: 0021754
2019-04-27 15:43 jfudickar Note Added: 0021768
2019-04-27 15:43 jfudickar Status confirmed => resolved
2019-04-27 15:43 jfudickar Resolution open => fixed
2019-04-27 15:43 jfudickar Assigned To => jfudickar