>Error 1103 - Invalid Seek Offset - is usually caused by corrupted index files. However, I just ran into a completely different cause: trying to FOPEN() a large file (43GB). FWIW it was on Vista32.
>
>I don't know how large a file FOPEN() can successfully open, or whether running on a 64-bit OS makes any difference.

From my StreamFso Class created on similar reasons

		this.oFileSystem	= createobject( "Scripting.FileSystemObject")
		this.oFile			= this.oFileSystem.getfile( m.tcFilename )
		this.oStream		= this.oFile.OpenAsTextStream(1)

which subclasses a StreamLlf class which uses only vfp LLF calls and
replaces those LLF functions with FSO calls to internal objects.
Should be enough to give you the picture...

On the plus side: when writing large amounts of data I sometimes found
large speedenhancements going the COM way.

regards

thomas