Error F0                     Disk Write Error                        pp 328


 Source:   IOResult

 Cause:    1)  The disk is full.
           2)  The disk had an unrecoverable write fault.


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 Remedy:   A disk full condition may occur with ouput operations such as
           WRITE, WRITELN, BLOCKWRITE, and FLUSH.  Note that READ, READLN,
           and CLOSE may also cause this error, as they cause the write
           buffer to be flushed.

           Examine the disk for an out of space condition or bad sectors.