> My idl code is: > -------------------------------- > > lun=13 > aaa=fltarr(2,180,51) > spawn,'/usr/ucb/uncompress -c'+'~anilk/Nimbus7/GriddedData/grid_EP_79134.dat.Z',unit=lun > readf,lun,aaa > print, aaa > close,lun > Don't you need a space after the -c? Dick