Unable to extract any lines of shapes because the reference attachment is Read Only

Hello Kang, 

Please use the Range box node to use the reference attachment elements. Please have a look at the attached image on how to use the Range node. Then get a required geometry node and use the technique From Element In Range. Hope this helps you. 

Regards,
Alifur

Yes i do know about range box and use it. the problem is the Read Only. 
for unknown reason, all my old model can read the attachment properly 
all the newly created model cannot, the element being read will all be converted to read only 

Hello Kang, 

Can you send us that reference files? we would try the same on our end. 

Regards,
Alifur

i do not think its the reference file problem,

every single files i have face the same problem. 
even a newly drawn file with only one single straight line face the same problem 

As Alifur mentioned, you need to actually use a range box, then import the elements using a node e.g. if you want to import the polylines, use the PolyLine.FromElementsInRange method. That will import all polylines in the active model. You can also specify a specific reference attachment in this technique input.

By default if you use the reference node it will always say that the elements are "read-only" since the attachment is locked for reading in GC

As Alifur mentioned, you need to actually use a range box, then import the elements using a node e.g. if you want to import the polylines, use the PolyLine.FromElementsInRange method. That will import all polylines in the active model. You can also specify a specific reference attachment in this technique input.

By default if you use the reference node it will always say that the elements are "read-only" since the attachment is locked for reading in GC

hmmm. I have done a full reset on my GC settings and it works now. 

thanks nevertheless