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Hi Michał,
maybe there is some js script (or css)?
you can try to add a new step, in the matrix enable ONLY this list on it and see if it will be possible to add/remove rows. This way you will check if there is something wrong with this list or if other attributes/scripts do it.

Hi everyone,
I have a problem in a project that I took over some time ago from another developer. Specifically, the "add" button for the item list only appears on the first step, where the item list is visible. On every subsequent step, although the list is editable, there is no "add" button to allow adding more rows. Similarly, on the following steps, there are no action buttons like "clone" or "delete." I have checked the editability in these steps—both on the attribute and on the matrix (inheritance is not broken)—and made sure that it is not being manipulated by any form rule.

I am using version 2025.2.1.91.

Does anyone know what might cause this?

Hey! I’ve run into a similar issue before in BPS. The “tokensContainer” null error often appears when the global action runs without proper context, especially if the business rule depends on workflow context or parameters that aren’t available during the cyclical trigger. One workaround is to refactor the business rule to avoid relying on those tokens or pass in defaults when null. Also, double-check if the data source “Windykacja - Fetch debtors” needs any specific context to initialize. Your setup sounds solid otherwise. Hope this helps!

Assuming you don't need to fetch data from the current transaction, as a workaround that doesn't require major changes (like changing the data source to a connection at each point of use), I suggest changing the connection in your data source configuration from "current BPS database" to a new connection to the same database. Then the data source won't hook into the transaction and the error won't occur.

Hello,

How did You fixed the problem ? Just turning time synch with AD ? Our time seems to be OK but from time to time we are also getting the "Cannot connect to license server". Solution for us is restarting the webcon workflow service.

Logs say:

Message=No connection could be made because the target machine actively refused it. (xxxxxxx:8002)
Source=System.Private.ServiceModel

Hi Damian,
I'm using same veresion, and CTE are used around our configurations too, so i'll post the ticket to Webcon team next week.

Unfortunately, we do not have an SLA, so I cannot create a ticket.

Hi Damian,

ok, now we have two different kinds of errors. This definitely looks more like a bug then a feature. :)

Can you open a ticket? We aren't using the version, so I wouldn't be able to answer any questions from the support team.

Best regards,
Daniel

Hi Daniel,

It looks like the data table is having an error when using the Data Source as well. When I copied and pasted the CTE SQL to the Data Table config, it worked as normal.


Error on Data Table

---> System.Exception: Błąd pobierania danych ze źródła o nazwie: [Vendor] Różnica danych (v3) ID: 138

---> Microsoft.Data.SqlClient.SqlException (0x80131904): Incorrect syntax near ';'.
Incorrect syntax near the keyword 'as'.
Incorrect syntax near ','.
Incorrect syntax near ','.
Incorrect syntax near ','.
at Microsoft.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

Hi Damian,

I assume something was changed which unfortunately causes this issue. I don't assume that this has been intended.
Did you test whether:
- You Can use the "Test " button of the expression editor of the data source itself?
- You can use the data source for a data table?

There has been one other forum post with this error message but in an unrelated context.
https://community.webcon.com/forum/thread/6425?messageid=6425

Best regards,
Daniel