>>>>>>>Is there any setting to have this deferred writing turned off, or should I just close and reopen the target file every now and then?
>>>>>>
>>>>>>Uses you a buffered file ?
>>>>>
>>>>>Mmm... good idea. The source file is buffered. Didn't find any parameters in the fCreate() command that would influence any buffering, but then I could close it immediately after and do a fopen(cTargetFile, 11) (unbuffered, write-only). I'll see what this gives me.
>>>>
>>>>Dragan, Don't forget to post the result to me.
>>>
>>>fFlush() wasn't even necessary... your idea to use unbuffered LL file operation was exactly what I needed. Works perfect.
>>
>>Well Dragan, was what I wanted to feel.
>>
>>Certainly that an enigma remains to understand because
>>FCREATE() doesn't allow to disable the OS buffering.
>
>Here's what I did - fcreate()d it, then closed and opened write-only without buffering:
>

Procedure DoCopy(tcF1, tcF2)
>*-- dn 26/08/05
>	Local c, o, N, i, l, cCRS, h1, h2, nSoFar, nChunk
>
>*[2005/08/29 09:01:05] dragan - try without buffering, as Fabio suggested
>	h1=Fopen(tcF1,10)
>	h2=Fcreate(tcF2)
>	=fclose(h2)
*This is the point where the code loses its safety,  
*for some microsecond you lose the control of the file
* don't close and to use FFLUSH is disgusting but it resolves the problem

>	h2=fopen(tcF2,11)
>
>	N=Fseek(h1,0,2)
>	Fseek(h1,0,0)
>	nSoFar=N/40
>	nChunk=nSoFar
>	Do While !Feof(h1)
>*		c=Fread(h1, 0x7fff)
>		Fwrite(h2,Fread(h1, 0x7fff)) && why not this ?
*
>		i=Fseek(h1,0,1)
>		If i>nSoFar
>			oLog.Log(Transform(i/N*100, "999.99%")+" copied")
>			nSoFar = nSoFar + nChunk
>		Endif
>	Enddo
>	Fclose(h1)
>	Fclose(h2)