This article helps to fix 'Package Not found' error during upgrades.
You will receive the below error when you try to add the image to SRX
request system software add “/cf/var/tmp/junos-srxsme-20.4R3-S10 (1).2.tgz” no-copy
Error: package /cf/var/tmp/junos-srxsme-20.4R3-S10.2.tgz is not found pr empty
In the below error the image name has '(1)'. Usually when we make a copy of an email after downloading from the Downloads page, it has (1), (2) etc added to the name.
While copying image to /var/tmp folder we must make sure that the image name is correct. If not SRX will not recognise it. Also, there is no double quotation after 'request system software add'
If the image name is saved as 'junos-srxsme-20.4R3-S10 (1).2.tgz', it must be renamed to 'junos-srxsme-20.4R3-S10.2.tgz'
After re-naming it, copy the image to /var/tmp folder and proceed with the upgrade normally.