techTruncateTechFile

techTruncateTechFile( 
d_techID 
) 
=> t / nil

Deletes the contents of the technology database stored on disk.

This function deletes data from disk. Use this function with extreme care.

d_techID

The identifier of the technology database.

`t`	The technology database was truncated.
`nil`	The technology database does not exist.

techTruncateTechFile(tfID)
=> t

Truncates the technology database identified by tfID.