Hello all,
here is the correct command
Copying from RE0 to RE1
file copy /var/tmp/jinstall64-15.1R6.7-domestic-signed.tgz re1:/var/tmp/jinstall64-15.1R6.7-domestic-signed.tgz
copying from RE1 to RE0
file copy /var/tmp/jinstall64-15.1R6.7-domestic-signed.tgz re0:/var/tmp/jinstall64-15.1R6.7-domestic-signed.tgz
Using jinstall64-15.1R6.7-domestic-signed.tgz as a reference image. you can change yours to the intending image.