I wrote:

.... print_ID(output_file_name); pdf_print_nl; pdf_begin_stream; for k := 0 to sys_obj_ptr do

From other bits of code, it looks like the initial value of k should be one, not zero?

That was definately not true. At least not always, because I 'fixed' it and now my pdfs make xpdf and acroread segfault. :-( Taco