In customer`s site, there is one 9 serial termianl abnormal, normal upgrade and minimum upgrade both are unsuccessful,then they try to format the terminal first then upgrade the with latest version(after R11), there is an error says load initial license failed.
As for the terminal version of R11, when upgrade the version, it will check the license file, but for old version such as R10 version,it will not.
1.After we format the terminal, try to upgrade the terminal into R10 version.
2.After we finish the upgrade, feedback the mac and SN of the termianl to R&D, then make the initial license.
3.According to the actual situation(usually based on the contract),R&D make the commerial license.
4.Import the new initial license again.
Usually for terminal upgrade, if the normal upgrade is invalid,most situation we can use minimum upgrade, if still failed, the last way is format the terminal.Here we should know there is risks to format, such as such situation, after upgrade the terminal, the license is lost, we have to use another way to solve this problem.