"Write_canceled" problem

I’m using version 4.2.11 with Kepware OPC server V5.4.

By the way, is it possible with a DB to OPC block group to use only some column of a table. For example, I would like to use only the “value” column and not the “adress” column of a table. I will choose wich “value” with a specific where clause on the adress but only use the block data item of the “value” in the group. I don’t know if you see what I’m trying to do? Is this something possible if the table have the same number of row than the number of item in the block data item?
Hope I’m clear, it’s been a long day!
Regards,
Mio Vaillancourt-Thivierge