Error building X-Plane data

[coastalguy]

After reading my X-Plane .dat files and beginning to build the databases, I received the following error. I tried it several times with the same error:

Failed to build database (A duplicate value cannot be inserted into a unique index. [table name = Runways,Constaint name = PK_Runways ]) See log file for more details.

This happened while "Writing 36989 Runways".

[tim arnot]

Could you attach the log file please? Thanks.