I couldn't able to change the table width( drawings units) and width (characters) on some of my drawings.
Could not able to type any thing on column section and it shows blank.
I would really appreciate if i get an suggestion on this .
I think you are selecting a single row of table and right Click > Height. If so, Width will remain inactive.
Select complete table (use filter or Window selection) > RMB > Height and Width, you should be able to control Width.
I think you understand that it is very difficult to guess what's wrong with your specific table
Can't you really upload your drawing+drawing model?