ECommonCalendarError when selecting date in Bind Variables window (Toad Beta & 2026 R1)

Toad for Oracle - Beta
1

Hi everyone,

I am consistently encountering an unhandled exception in the latest Toad for Oracle Beta (v26.2.222.8909) as well as the 2026 R1 Release.

Note: Since I am a new forum user, the system does not allow me to attach the full text or log files directly. Therefore, I have extracted and pasted the most critical parts of the call stack below.

Issue Description:

The crash occurs specifically when I execute a query containing bind variables, which pops up the Variables window (TFormBindVariables). When I click to modify or select a date value using the date editor option, the application throws an ECommonCalendarError exception.

I have already tried changing and testing all available date/time format options within Toad's Options/Preferences, but the crash persists regardless of the internal formatting settings.

Error Message:

Type: ECommonCalendarError

Message: Failed to set calendar date or time.

Source Unit/Class: Vcl.ComCtrls / TCommonCalendar -> SetDateTime

Steps to Reproduce:

  1. Write a query with a bind variable (e.g., :my_date).

  2. Execute the statement to open the Variables modal window.

  3. Attempt to click or trigger the date editor (ShowDateEditor / btnEditClick) for the date type variable.

  4. The calendar control fails to initialize properly, leading to the crash.

Environment Details:

  • OS: Windows 10 (64-bit) - System Language/Locale set to Turkish (Non-Unicode Language: Turkish 041F).

  • Toad Versions affected: v26.2.222.8909 (Beta) & v26.1.193.8012 (2026 R1).

Call Stack Highlight:

Vcl.ComCtrls.pas      | TCommonCalendar   | SetDateTime             | Line 29853
Vcl.ComCtrls.pas      | TCommonCalendar   | CreateWnd               | Line 29786
Vcl.ComCtrls.pas      | TDateTimePicker   | CreateWnd               | Line 30373
frmModalCalendar.pas                      | InputDateTimeQuery      | Line 72
frmBindVariables.pas                      | ShowDateEditor          | Line 453
frmBindVariables.pas                      | btnEditClick            | Line 467

Suspected Cause:

Since my Windows system locale settings are Turkish, I strongly suspect there is a date-time parsing/formatting conflict between the OS regional settings and the VCL's TDateTimePicker component rendering wrapper when it initializes.

Has anyone else experienced this with non-English Windows locales, or is there a known workaround while the dev team looks into this?

Thanks in advance!

2

Hi Matt,

Thanks for all of the details and congrats on the World Cup win last night.

You are probably right about the date format. As a workaround, you may be able to fix it by going to Options -> Data Grids -> Data and setting the date format there to match your windows settings.

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I will try to reproduce this soon and let you know what I find.

-John

3

I just tried to reproduce this by changing the windows date and time format to various settings.

I was never able to reproduce any problem when setting values for date type variables in the editor.

I am on Windows 11 though. I can try again with 10 next week.