can't open database msgstore.db

[diqidevdroid1]

hi, i've tried on android 7 rooted device and got problem can not open database with following message (logcat) :
on script --> Shell.SU.run("chmod 777 /data/data/com.whatsapp/databases/msgstore.db")

Failed to open database '/data/data/com.whatsapp/databases/msgstore.db'
Error Code : 1806 (SQLITE_CANTOPEN_EACCES)
Caused By : Application has no permission to open the specified database file.
(unknown error (code 1806): Could not open database)

but, previously tried on android version 4.4 down can work.
Whether this is related to security mode in android related enforcing and permissive ?, is there a solution to this ?.

thanks..

[diqidevdroid1]

sorry to add, from the above issue, more precisely the problem on the line:
db = SQLiteDatabase.openOrCreateDatabase (new File ("/ data / data / com.whatsapp / databases / msgstore.db"), null);

thanks..