The DNS server unable to write zone file filename for zone name. Most likely the server disk is full. Free some disk space and re-initiate zone write.
You might not have permission to access this file.
Check the permissions on the specified file: 1) In Windows Explorer, go to the Systemroot\System32\Dns folder. 2) Right-click the specified database file, and then click Properties. 3) Click the Security tab, and then click Permissions. 4) Verify that you have the proper permissions to read, write, and then run the file.