I am trying to write and svcd component description file, but every time I start the debugger it is deleted again.
I have never seen this. I have a custom SCVD file for USB events, which I saved alongside the source files (not in an output directory, for example). What are you naming the file, and where is it in the project file hierarchy?
I am basically editing the automatically generated empty file. I can check and uncheck in in "Mangage Component Viewer Description Files". Maybe I should try making a second custom file and include it.