Object reference not set to an instance of an object

Hi Lydia,

Yes I do. I have a SharePoint list with 40 tables and I chose to use 5 of them : "Table A", "Table B", "Table C", "Table D" and "Table ListProject".

In Table ListProject I have the following columns : idProject, ProjectName, ... and >20 other columns

In Table B, C, D I have the following columns : LastName, FirstName, idProject, ... and >20 other columns

In Table A I only have the following columns : LastName, FirstName ... and >20 other columns but not "idProject" ... although I can see it on the my SharePoint like for Table B, C, D.

In the Query Editor, when requesting Table A, I can see the following screen, and when I try to develop the table "Projet" to get the id and the title I get this error message : "Unexpected error : Object reference not set to an instance of an object"

Additional remarks :

- when I develop the other column with "record" at every line, I get the right information

- when I develop other columns with "table" at every line, I get "error" instead, except for all the "null" values

Regards,

Antoine