reading a nonstandard dimensioned variable

[Dan Schwarzkopf]

I have , in a netCDF file, a variable
solar_flx dimensioned (time,freq,pfull,lat,lon)
lat=1; lon=1; pfull=1(the z-coordinate); freq=18 (unequally spaced);
time=1500
I am trying to read this with xdfopen, using the example in the
documentation
which appears to be:
xdfopen yyy.ctl
where yyy looks like what's below:
DSET ...
VARS 18
solar_flx=>solflx1 0 t,0,z,y,x
...  (17 more lines)
ENDVARS
but this syntax is wrong.
What is the correct syntax?