Could someone give some help for me? 
   
  If I do metapost I have an error message: this is the exact error message
   
   
  C:\Han\slide>mpost --tex=latex 2MS6
This is MetaPost, Version 0.993 (Web2C 7.5.6)
(2MS6.mpmakempx: Command failed: mpto -tex 2MS6.mp
  >> 2MS6.mp
>> 2MS6.mpx
! Unable to make mpx file.
l.34 label.lft(btex
                    Number of students etex rotated 90, (-u,u));
Transcript written on 2MS6.log.
   
   
   
   
  But if I set the path "path c:\TexLive2007\bin\win32" at prompt command and then do metapost, then it is O.K. (no error message) as I copied below.
  
C:\Han\slide>path c:\TexLive2007\bin\win32
  C:\Han\slide>mpost --tex=latex 2MS6
This is MetaPost, Version 0.993 (Web2C 7.5.6)
(2MS6.mp [0] [1] [2] [3] [4] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19]
[30] )
16 output files written: 2MS6.0 .. 2MS6.30
Transcript written on 2MS6.log.
   
   
  I have to set the path again whenever I turn on the PC. This all problem started after I did mptopdf.ini
   
  Can anyone give some insight for me?
   
  Thank you in advance.

 
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