ID 540205 - In a GafferThree node, you are unable to edit an adopted template material and an error is printed to the Messages tab when selecting the template material within the node

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Problem summary
In a GafferThree node, you are unable to edit an adopted template material and error is printed to the Messages tab when selecting the template material within the node.
 
Customer reported version
Katana 6.0v2
 
Customer reported platform
N/A
 
Steps to reproduce
 

  1. 1. Open Katana and create a GafferThree node.
     
  2. 2. Right click in the GafferThree node and click Add > Template Material.
     
  3. 3. Create a second GafferThree node and connect it downstream of the first.
     
  4. 4. View the downstream GafferThree node and click the cog icon and Enable “Show Incoming Scene” .
     
  5. 5. Right-click the incoming template material package and click “Adopt for Editing”.
 
Expected behaviour
The Template Material becomes editable.
 
Actual behaviour
The Template Material is not editable and an error is shown in the Messages Tab.
 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
Katana 6.0v2 - Windows 10, CentOS 7
Katana 5.0v1 - Windows 10, CentOS 7
Katana 4.5v1 - Windows 10, CentOS 7
 
Unable to reproduce bug in:
Katana 4.0v8 - Windows 10, CentOS 7
 
Earliest version tested
Katana 4.0v8 - This issue doesn't appear in this version and has regressed 

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