The DNS server was unable to open file %1 for write. Most likely the file is a zone file that is already open. Close the zone file 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.