This is about Windows version of POV-Ray 3.6 beta 2 on Windows 2000.

First create a file "temp.dat" that has only one numerical value in it 
("0", without quotes for example) in the same directory as the scene 
below. When I try to render the scene, I get 'The instruction at ".." 
referenced memory at "..". The memory could not be "read"'. This is the 
scene:

#declare A = 0;
#macro Read_Data()
     #fopen File "temp.dat" read
     #read(File, A)
     #fclose File
#end
Read_Data()

If the first line (#declare A=0;) is commented out I get the same error 
expect '...could not be "written"'. In both cases I can read the next in 
the message window:

"File context (5 lines):
0
Parse error: End of file reached but #end expected".

Now, if I place a comma after the "0" in temp.dat the scene parses 
normally in both cases.

Interestingly the next scene renders normally even _without_ the comma 
mentioned above - also without the declaration. The only difference is 
that macro is not used.

#declare A = 0;

#fopen File "temp.dat" read
#read(File, A)
#fclose File

Also, if the "temp.dat" file does not exist POV-Ray gives "Runtime 
Error!" and exits instantly.

Severi Salminen

Post a reply to this message