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Event ID: 1503 Source: DNS

Source
Level
Description
The DNS server could not parse the zone file <file> at line <number>. Although the DNS server continues to load, ignoring this line, it is recommended that you either correct the line or remove it from the zone file. The zone file is located in the %SystemRoot%\\System32\\Dns directory.
Comments
 
This problem occurs if the zone file does not contain WINS Lookup records. The DNS service may start, but the zone is treated as Reverse. As a result, name resolution of hosts contained in the zone do not resolve and it may not be possible to add new records to the zone file using the DNS user interface. This is because the INT zone file was not recognized as Forward when the DNS service was started. See ME239079 to solve this problem.

This problem occurs because there is an invalid HINFO record in the zone file. See ME195669 and "the link to "JSI Tip 0786" for details.

As per Microsoft: "The specified database file might be corrupted due to formatting or syntax errors". See ME203009, ME236460 and MSW2KDB for additional information on this event.

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