echo: write error: Operation not permitted issue

Hello i am trying to use the echo command to load firmware to the PRU on the Beaglebone black with the following command: root@beaglebone:~# echo 'am335x-pru1-fw' > /sys/class/remoteproc/remoteproc2/firmware However, i get the following error: -bash: echo: write error: Operation not permitted I can load firmware into pru0 without error but pru1 does not work. I am currently following the tutorial at this link if you are interested(download the zip file): https://e2e.ti.com/support/processors-group/processors/f/processors-forum/967535/faq-where-did-the-rpmsg-quick-start-guide-wiki-go Also the pru1 core seems to be running: root@beaglebone:/sys/class/remoteproc/remoteproc2# cat state running And when i try to stop it i get the same error message: root@beaglebone:/sys/class/remoteproc/remoteproc2# echo 'stop' > state -bash: echo: write error: Operation not permitted also my kernel on my bbb is: 4.19.94-ti-r42 The output of ls -l in the /sys/class/remoteproc/remoteproc2/ is: lrwxrwxrwx 1 root root 0 Jul 28 19:24 device -> ../../../44d00000.wkup_m3 -rwxrwxrwx 1 root root 4096 Jul 28 19:24 firmware -r--r--r-- 1 root root 4096 Jul 28 19:24 name drwxr-xr-x 2 root root 0 Jul 28 19:24 power -rwxrwxrwx 1 root root 4096 Jul 28 19:47 state lrwxrwxrwx 1 root root 0 Jul 28 19:24 subsystem -> ../../../../../../../class/remoteproc -rw-r--r-- 1 root root 4096 Jul 28 19:24 uevent If you require any other info let me know and thank you!