AutoCAD 2013/2014 DWG Format

[#1]

In block attribute manager i can see the number of instances of the selected block in the current drawing. Can I set this value in the field?

[#2]

You could do this by creating an AutoLISP variable that stores the number of blocks. Your field could reference the variable.

(setq blknm (getstring "\nEnter Block Name: "))
(setq ss (ssget "x" (list (cons 0 "INSERT")(cons 2 Blknm))))
(setq sslen (sslength ss))

Have the field reference the variable sslen. This will not update automatically when additional copies of the block are inserted. You would either have to run it manually or put it in acaddoc.lsp so it loads with each drawing you open.

[#3]

i created file %name%.lsp

with code

"(setq blknm (getstring "\nEnter Block Name: "))
(setq ss (ssget "x" (list (cons 0 "INSERT")(cons 2 Blknm))))
(setq sslen (sslength ss))

"

next i used command appload for load this file.

and now i have lispVariable only blknm. 

[#4]

You should also have SSLEN. I have attached a lisp file that works correclty.

[#5]

If you can't or don't want to use lisp, another option would be to create a DataExtraction table. The Quantity cell will update (semi) automatically like a field.