Some times when I have narrowed it down to specific input sheets or sections, I try switching into (Ctrl+W) Batch mode, going to that section, typing in the code# of the field I want to be on, and then switching (Ctrl+W) *BACK* to Interactive mode.  The cursor should be on that code.
  If I can then operate as normal, then it is something specifically to do with Lacerte getting TO that area, but the input itself is fine.
  If the Ctrl+W back to Interactive fails/hangs your program, then something about that area in particular is out of whack.



Robert