I have a valid container (I can print the contents-- 707 lines-- to a window). But when I try to put the contents into a EUTC, the code consistently crashes in FB 5.3b4. Can anyone see what I'm overlooking? Here is the pertinent code: // EUTC created with this SetRect( r, 10, 10, 190, 455 ) appearance button _fontsEF,,,,,, @r, _kControlEditUnicodeTextProc // gC is a valid container with 707 lines of Str255s // Here is how I am trying to load the container into the control dim as Pointer p dim as Long size p = [[@gC]] size = fn GetPtrSize( p ) long if ( p ) err = fn SetControlData( button&( _fontsEF ), _kControlEditTextPart, _kControlEditTextTextTag, size, #p ) end if Ken