Pre-upgrade check failed. Return code -1

[lwmoore-mmc]

On a C93108TC-EX currently running nxos64-cs.10.2.5.M.bin working on upgrading to nxos64-cs.10.3.7.M.bin. Recommended path: 10.2.5M->10.2.7M->10.3.7.. I have copied necessary files and completed a MD5SUM check which produced the correct value. When I run the command:show install all impact nxos bootflash:nxos64-cs.10.2.7.M.bin, the switch responds with the following: Pre-upgrade check failed. Return code -1. I have been unable to find this code on Cisco website, but most codes point to diskspace, corrupt file, etc. I have pleanty of space on the bootflash. I have this same issue on multiple switches, but not all switches of the same model and at the same level. These are VPC paired switches, but other VPC paired switches have no issue. Any ideas would be appreciated.

[Mark Elsen · Accepted solution]

  - @lwmoore-mmc   Enter the command  : n9k# show system internal flash
                                 Check if there is sufficient free space on /nxos/tmp

                                 If not : run bash sudo su
                                                  cd /nxos/tmp
                                                  ls -l
                                 Identify and delete any unnecessary files.

 M.