bug in splot and datafile with 4 columns

[Petr M. <mi...@ph...>]

I have found a bug:

Having a datafile with at least 4 columns, for example:

0 0 0 5
0 1 1 5
0 2 2 5

1 0 1 5
1 1 2 5
1 2 4 5

then
	splot 'a.dat'

reports

gnuplot> splot 'a3d.dat'
               ^
         Wrong number of columns in input data - line 1

You have to say explicitly:
	splot 'a3d.dat' u 1:2:3


Can somebody find out wherefrom this bugs comes?

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PM