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Here is the problem:

I have a Mastertable that is empty
I also have a not empty Detailtable (TUnitable, only) whose key is a TAutoincField

Unidac raises an exception due the param to acess detailtable cannot be null:

Parameter[0]: Number - The data value violates the schema´s constraint for
the column (Status = Bh)
In the begining of Sdac this error had ocurred, but it was fixed.

It seems that unidac has the same problem.

Hello,

I cannot reproduce the problem. Please post here or send to andreyz*devart*com a script to create your master and detail tables. Also please specify the way you establish master/detail relationship. Are you using the MasterFields and DetailFields properties, or SQL code?

I sent you the required example.

Thank you for the information. We have reproduced the problem and the investigation of the problem is in progress. As soon as we solve the problem we will let you know.

Dear sirs,

Do you know how can I by pass this problem while you are investigating it?

It is mostly sure an incompatibility between the Integer master Field (which can be null) and the Autoinc detail Field (which cannot be null).

If there will be no workaround to this, every master-detail relationship between a query and a table will be compromised and will have to be checked in a large system, like mine.

Thanks

We have already fixed this problem. This fix will be included in the next UniDAC build. We are going to release UniDAC this week.