If I create a new B4A (v6.00) project.
Go into Designer.
Add a gif image file.
The image filename contains "Upper case and Lower case" characters.
Add ImageView.
Select this added gif file to the Image File property.
Save the layout and close Designer.
Run Designer again.
Look at the Image File property of the ImageView.
It is empty.
If the added gif file name is all lower case, then it works fine.
Same for Button view bitmap drawable image file properties.
Go into Designer.
Add a gif image file.
The image filename contains "Upper case and Lower case" characters.
Add ImageView.
Select this added gif file to the Image File property.
Save the layout and close Designer.
Run Designer again.
Look at the Image File property of the ImageView.
It is empty.
If the added gif file name is all lower case, then it works fine.
Same for Button view bitmap drawable image file properties.