I noticed someone mentionned this in the newsgroups a few years ago, I 
guess it's still the same?  #read only supports 3D vectors, not 2,4 or 5?  
Unless I'm doing something wrong?  (Yeah, I know, just use four seperate 
floats and reassign the 4D vector with them... just not as elegant)

Example:
//[...]
#declare CurColor = <1,1,1,0.8>;
#if (clock > 0)
  #fopen ColorFile "curcolor.dat" read
  #read (ColorFile,CurColor)  // <- Error
  #fclose ColorFile
#end

//[...]

#macro V4strC(V)
    concat("<",vstr(4,V,",",10,7),">, ")
#end

#fopen ColorFile "curcolor.dat" write
#write (ColorFile,V4strC(CurColor),"\n")
#fclose ColorFile

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