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I'm using Keil uVision4 version 4.54.0.0. When I check out a .cpp file from uVision4 IDE, I get the following message from Keil:
"Project file is read only. Saving is not possible!"
From Windows Explorer I see "Read-Only" attribute is not set on filename.uvproj. Also, filename.uvproj is checked out.
Why does keil display above message ?
Directories like "Program Files" may not permit writing, or those belonging to other users or otherwise protected. Files opened and locked by others may also not be accessible.
Use the file manager to uncheck "Read Only" attributes on the directory, and all it's subdirectories and contents.
If Window's file manager doesn't suit your needs investigate some others that might more clearly display the file/directory states, and change them.
>> Use the file manager to uncheck "Read Only" attributes on the directory, and all it's subdirectories and contents.
Taking this action solved the problem. Thank you very much!