SYMPTOM:
In Linux environment, after input all necessary information and click Activate in Strategy License Manager 10.x, below errors appears:

Sample Code/Error
License Manager failed to generate the activation file because the permission is denied.
Click OK, the window of License Manager disappears. Below entries are caught in the Linux terminal:
Sample Code/Error
$ ./mstrlicmgr
WARNING: environment variable $MSTR_REGISTRY_FILE points to a non-writeable file '/home/mstr902/MicroStrategy/MSIReg.reg'
CAUSE:
The account used to activate Strategy product is different from the account used to install Strategy.
The account used to install the product could be determined form the MSIReg.reg file, as shown below:
ACTION:
Switch to the account used to install Strategy or use root account.