Error -4518 when using print xxx wordwrap

Im using I4gl 4.10.UD2 and the following program crashes. Any explanations? Should the 'wordwrap' function be avoided? Thanks, Gaukur. database nkhi define he char(100) main start report p_listi to "/vd/gaukur/Tsstest.dat" output to report p_listi() finish report p_listi end main report p_listi() output right margin 50 top margin 0 bottom margin 0 page length 3 format on every row let he = "Afi" print he wordwrap call tss_hog() end report function tss_hog() define n smallint, str_var char(50) for n=1 to 1000 let str_var=tss_hog1() end for end function function tss_hog1() return "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" end function