Christian Froeschlin wrote:

> Ger wrote:
> 
>>     #fopen FN FileName read
>>     #ifdef (FN)
>>       #while (defined(FN))
>> #read ( FN , Vector)
>> action( Vector )
>>       #end
>>     #end
> 
> the documentation of #fopen states that IDENTIFIER should be
> an undefined identifier. So it might be that the #ifdef test
> only works if FN was not alreaday defined prior to #fopen.

From the manual
<
You may use #ifdef FILE_HANDLE_IDENTIFIER to see if a file is open.
>
-- 
Ger

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