windows application using JScript code for different functionalities. it is not working properly after latest upgrade to Windows 11 24H2

Question

windows application using JScript code for different functionalities. it is not working properly after latest upgrade to Windows 11 24H2

Amit Kanase (akanase) 10

We have a windows application written in Delphi 10.2 Language and in background running JScript code for different functionalities. which was working fine earlier with windows 11 23H2. but after latest upgrade Windows 11 24H2 same JScript code is not working and throwing error: Object doesn't support this property or method at multiple places.

Jscript error

JScript error 2

1 answer

Your answer

Answer 1

Anonymous

Hello Amit Kanase (akanase),

Thank you for posting in Q&A forum.

This error, "Object doesn't support this property or method," often occurs when the JScript engine encounters an object or method that is no longer supported or has been altered in the new environment.

Here is something you could try:

Review the Windows 11 24H2 release notes to identify any deprecated features or changes in the JScript engine that might be causing the issue.
Ensure your JScript code is up-to-date and compatible with the latest standards. Look for any deprecated methods or properties and replace them with their modern equivalents.
Run your application in compatibility mode for an earlier version of Windows. Right-click on the application executable, go to Properties > Compatibility, and select an earlier version of Windows.
Use debugging tools to pinpoint the exact lines of code causing the error. Tools like the Developer Tools in browsers (F12) or dedicated JScript debuggers can help identify problematic code.

I hope the information above is helpful.

If you have any questions or concerns, please feel free to let us know.

Best Regards,

Daisy Zhou

============================================

If the Answer is helpful, please click "Accept Answer" and upvote it.

Amit Kanase (akanase) 10 Reputation points

2024-11-20T13:13:38.68+00:00

Hi Daisy Zhou, Thanks for your response,

we have windows application and cannot debug the JScript through browser. also, we tried to look into windows change logs which are not useful. At the moment we are getting this issue in multiple functions and properties. we tried compatibility mode to lower version as well but not resolving the issue.

Temporarily we found one solution as mentioned in the below thread: https://admx.help/?Category=Windows_11_2022&Policy=Microsoft.Policies.InternetExplorer::JScriptReplacement

is it recommended to use this gpedit change? or is there any other solution?
MotoX80 36,291 Reputation points

2024-11-20T14:23:22.26+00:00

While the error might be occurring in JavaScript code, the root problem might be in the code that creates the object that JS is trying to reference.

What is the object that JS is referencing? Is it a COM object? Are there other properties that your JS code can test to see if the variable is null or contains an actual object?

Does the Delphi code create that object, or does JS issue a CreateObject call? Can you modify that code to validate the object?

I have no experience with Delphi or how it calls your JS code. You may have better luck posting this question in a Delphi support forum.
Amit Kanase (akanase) 10 Reputation points

2024-11-25T15:04:11.9833333+00:00

Hi,

This issue occurred because Windows 11 24H2 has begun setting a local policy that, by default, causes applications to use the JScript9Legacy.dll instead ofJScript.dll.

Where can we find any deprecated features or changes between JScript9Legacy.dll and JScript.dll? so we can alternate functions or properties for the same deprecated code. if you can provide the detailed summary or any link to check it will be really helpful? In changelog I don't find much.

Thank You
MotoX80 36,291 Reputation points

2024-11-25T20:36:23.48+00:00

About all I could find was this comment that "json object component from Jscript.dll does not implement _NewEnum function as far as interop objects are concerned."

https://learn.microsoft.com/en-us/answers/questions/2101243/issue-with-jscript-dll-after-upgrading-from-window
Amit Kanase (akanase) 10 Reputation points

2024-12-02T12:43:18.05+00:00

Hi @MotoX80

we are using _NewEnum in the delphi source code as COM interaction with JScript at many places. do we have any alternative for _NewEnum at it is not supported in 24H2 and also, we are not able to find enough documentation or logs to identify which action we need to take.

Any suggestions how we can proceed with these JScript.dll issues in 24H2?
MotoX80 36,291 Reputation points

2024-12-02T14:33:25.2833333+00:00

I found this link from another 3rd party application that documents the problem that you describe.

Will their "Solution 1" work for you?

https://my.caseware.com/s/article/Script-errors-in-Working-Papers-Windows-24H2-Update?language=en_US
Amit Kanase (akanase) 10 Reputation points

2024-12-02T15:06:35.8233333+00:00

Hi @MotoX80 yes,

first solution in the above link does work for us. but is it officially recommended? or do we have any alternative options like change in code with alternative objects or functions for future proof of application?
MotoX80 36,291 Reputation points

2024-12-02T16:11:15.2366667+00:00

I'm sorry, I do not work for Microsoft and have no access to internal MS developers, planners, or support. I am a retired programmer/sysadmin who tries to help out other users.

Based on my experience, the first question that I would ask is: why are you using jscript if your main program is written in Delphi? What is your code doing that requires jscript? That is, why don't you write everything in Delphi?
Amit Kanase (akanase) 10 Reputation points

2024-12-02T16:18:37.7533333+00:00

Hi @MotoX80 really appreciate your help. we are writing all the scripting logic for the multiple databases in the JScript. it is easy to maintain and faster as well. In Delphi we are creating UI and some business logic. we are using all the scripting logic in JScript only.

Hi Daisy Zhou, can you please help here if any suggestions how we can go forward?
MotoX80 36,291 Reputation points

2024-12-02T16:43:02.9366667+00:00

I don't have any Delphi experience, so I have no idea how it is calling jscript.

One thought would be to contact Delphi support and explain to them that MS is locking down jscript and is causing you application problems. Ask them if they have any recommendations for using a different script engine.

It appears that this is possible. (For whatever "Tokyo" is.)

https://blogs.embarcadero.com/six-easy-ways-to-embed-javascript-engines-in-your-delphi-10-2-tokyo-apps/

Share via

windows application using JScript code for different functionalities. it is not working properly after latest upgrade to Windows 11 24H2

1 answer

Your answer