Field with the sum of blocks with the same attribute

[Anonymous]

Hi all!

I am looking for a way to automate the counting of blocks with the same attribute and show it with a field in the layout. How can I do it?

The blocks are luminaries. The name of each of them is the manufacturer code and as an attribute I put L1, L2, L3 ... It depends on the project, this attribute is changed but the name remains the same.

In quantity I want the field to come out with the sum of all the luminaries called L4 (in this case).

[paullimapa]

I've been wanting an automated block counting routine to update in a FIELD for years....but still no solutions...

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[Anonymous]

Here is a routine that works well but only processes the name of the block. I expected there to be a routine to process an Attribute.
https://forums.autodesk.com/t5/autocad-for-mac-forum/linking-a-field-to-a-block-count/m-p/6422966

[paullimapa]

This is a nice try. But unfortunately you still have to run the lisp routine to get the count to update.  This defeats the purpose of using a FIELD which is supposed to automatically update without running any routines.  You might as well use the many lisp codes that are available to just place the block count in a TEXT object which will only update after the lisp routine is run again. 

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