Change Attribute Value by known TAG name

[RockyBrown4134]

I need some help please with a small routine. 

I have a block that has attributes in it called Titleblock_2020. I have a LISP program that we use to insert the title block with default settings. There is one setting I need to have changed based on its Attribute Tag. Manually, its easy to do with ATTEDIT. Sometimes it gets changed, sometimes it doesn't. I wanted to automate it. I have tried several ways but I cant find the easiest way. I may be overlooking something, or I may be over thinking it as well. 

Block name: Titleblock_2020

Attribute Tag: ENG_GROUP

Variables:

TBNAME  =  Block Name

DIVNAME  = Company Division Name

I set the DIVNAMEariables in my code.

(setq TBNAME "Titleblock_2020")
(setq DIVNAME "GENERAL ENGINEERING")

Then I tried to edit the attribute.

(command "._attedit" "y" TBNAME "ENG_GROUP" DIVNAME)

This is where I get stuck. Any and all suggestions are welcome.

Thanks.

[_gile · Accepted solution]

Hi,

Since AutoCAD 2012, you can use the  setpropertyvalue function which considers the tag of the attribute as a property of the block reference.

(setpropertyvalue blockEname "ENG_GROUP" "GENERAL ENGINEERING")

[RockyBrown4134]

Thanks. I knew it had to be something simple. 

Ok. I added the code, however I get an error. Am I misunderstanding something? blockEname?? 

[RockyBrown4134]

Never mind. Stupid me. I answered my own question. I forgot to set the entity name.