Cant extract baseapp.tar

Hi

i tried to extract the baseapp.tar as described in the doc’s but cant get it extracted. Any ideas?

pi@raspberrypi:~/matrix-cli $ tar vcf baseapp.tar baseapp
tar: baseapp: Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors
pi@raspberrypi:~/matrix-cli $
pi@raspberrypi:~/matrix-cli $ tar tvf baseapp.tar
pi@raspberrypi:~/matrix-cli $ tar vcf baseapp.tar baseapp/
tar: baseapp: Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors

File exists and is 10240 bytes …