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Lcreate() uses the Fcreate() function to open a spreadsheet file. If
Fcreate() fails, then an empty array will be returned.  Examine the
value of FERROR()immediately after the call to Lcreate().  The error
returned from Ferror() will indicate what caused the problem.  The most
likely DOS errors you will run into are:

Ferror()  Meaning

   4     Too many files open, so increase your file handles
   5     Access denied, probably because a file already exists and is set
         to read-only or the network denies access to the file
  15     Invalid drive specified, check you file's drive letter
  19     Attempted to write to a write-protected, move the write protect
         notch or write to a hard disk
  21     Drive not ready, so close the drive door