>Maybe the cursor or grid's property is set to readonly !
>
>Do tell me what happened
No, all of them are set to be not ReadOnly. All of them enabled, too. It's not a cursor, it's a table without any buffering at all.

The only weirdness about this project is that it uses formset. Two forms were included in the project, which are just garbage, IOW, our old wgutility programs has these forms as a reference. I excluded them from the project, recompile it and now we can not select. If I copy all objects from this particular form to another test form, test form works fine.

I suggested my colleague to do this, but I'm not sure, she accepts this idea.
Besides, it would be great to understand the reason for this strange behavior.

Thanks for your help.