General debugging methods in extension development for Dynamics 365 Business Central.

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Posted on by CU08052056-0

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Hi experts!

I'm developing extensions using Visual Studio Code, and I'd like to know the following:

Is it possible to debug using breakpoints?

Since VS Code shows various errors before deployment, it seems that resolving these in the editor eliminates the need for debugging with breakpoints. What do you think?
Is it also possible to set breakpoints and debug the standard Base Application also?

Do you know useful reference manuals about debagging Business Central?

Look forward to hearing from you.

Nobuhara

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Dynamics 365 Business Central

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YUN ZHU 99,138 Super User 2026 Season 1 on at

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Of course, if not, developers will not be able to customize their own functions well.

For example,

Using AL Explorer to open standard Base Application

Set breakpoint

Debug mode

PS: Dynamics 365 Business Central: Publish without debugging (Ctrl+F5) and Debug without publishing (Ctrl+Shift+F5)

https://yzhums.com/52989/

Run the standard code

The code will stop at the set breakpoint

Thanks

ZHU

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Dynamics_Decoded_Gokul 487 on at

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Hi Nobuhara,

for the 1st question since you have not deployed the APP in business central, It will not be possible for you to debug the solution without deploying.

for the 2nd question, The answer is below by Mr. YUN ZHU. would be right approach

thanks

gokulnath

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Suresh Kulla 50,269 Super User 2026 Season 1 on at

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Yes, that is possible select the object from the .alpackages symbol the object you want to debug and set the breakpoint, you can debug Base Application objects.

See how to debug check these links

https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-debugging

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Sohail Ahmed 11,169 Super User 2026 Season 1 on at

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you need to publish your extension in debug mode and attach to your BC server, you can step through your code.

For the Base Application, you cannot directly debug Microsoft’s source, but you can debug through event subscribers or by downloading symbol references.

Common guides: Microsoft Learn docs on “Debugging AL” and the official AL language extension documentation are the best starting points.

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