Small and medium business | Business Central, N...

AL Compilation error: "The namespace 'TableName' is unknown" when creating a flowfield

(1) Share

Report

Posted on by Ghetz

3,013

So I create an extension with a table object. Then I want to add a flowfield to the /Sales invoice Header/ based on this new table, and I get compilation error /The namespace 'TableName' is unknown/ (AL0791), so I can't compile my extension. Any ideas? I've noticed this only happens when calcformula es /count/ or /exists/; if I use sum, there is no compiler error.

I have the same question (0)

All responses (5)

Answers (0)

Suggested answer

Mohamed Amine Mahmoudi 26,390 Super User 2025 Season 2 on at

Like (0)

Report
Hi @Ghetz,

I think you must add a name space Microsoft.Sales.History.

using Microsoft.Sales.History;

Best regards,

Mohamed Amine MAHMOUDI

Was this reply helpful? Yes No
Suggested answer

Saurav.Dhyani 14,380 Super User 2025 Season 2 on at

Like (0)

Report

Hi,

Check all objects in your extension.

There seems an object where you have defined namespaces (it may happen if you use AZ/AL Extension to develop new objects).

If you find namespace my table, remove that from that object.

That should fix the problem.

Regards,

Saurav Dhyani

https://bit.ly/SubscribeSauravYouTube

Was this reply helpful? Yes No
Suggested answer

YUN ZHU 95,331 Super User 2025 Season 2 on at

Like (0)

Report

I simply tested it and found that this problem does exist. .

But since it is Count, if you remove the following "No." field, the error will disappear.

Hope this helps.

Thanks.

ZHU

Was this reply helpful? Yes No
Suggested answer

Saurav.Dhyani 14,380 Super User 2025 Season 2 on at

Like (0)

Report

Hi,

It seems a bug, I would recommend reporting it to Microsoft.

Regards,

Saurav Dhyani

https://bit.ly/SubscribeSauravYouTube

Was this reply helpful? Yes No
Suggested answer

YUN ZHU 95,331 Super User 2025 Season 2 on at

Like (0)

Report

Hi, I briefly summarized it, and I hope the following information can give you some tips.

Dynamics 365 Business Central: The namespace ‘xxxx’ is unknown in CalcFormula Property

https://yzhums.com/51298/

Thanks.

ZHU

Was this reply helpful? Yes No