#467 question: if i try to draw on EXTBlock.drawing on KLayout 3.0.1 i get: ERRoR :: The selected Layer is not valid Issue created by olisnr is this intended? and if yes, why? [Image](https://private-user-images.githubusercontent.com/120017377/439715540-80bb432f-03ce-4e74-83cc-0343091a72e7.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDYyOTE0ODIsIm5iZiI6MTc0NjI5MTE4MiwicGF0aCI6Ii8xMjAwMTczNzcvNDM5NzE1NTQwLTgwYmI0MzJmLTAzY2UtNGU3NC04M2NjLTAzNDMwOTFhNzJlNy5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNTAzJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDUwM1QxNjUzMDJaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT0yMTY3NzdhNDcwZTc2YTNkNTc2Mjc0NDJjMzZmZjljZDYwZTRkZGFmMjM2YmE0MmEwMmJhMDFhNjYzZmE1ZGY2JlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.e9VdbYmjhgz9VyupMnfeIRIhU-M3Iv27Scq8tQT9Ass) IHP-GmbH/IHP-Open-PDK