Problem:
    The article and / or totals calculation is missing

Solution:
  The article and / or sum calculation is a mandatory information. Without this specification, your documents can not be processed.

    Please always use a unique anchor word, such as "Total:".
    Normally the unique indication (the anchor word) should have been agreed during the test phase. It should be noted that this is ALWAYS to be maintained.
   Thus, spelling mistakes within the anchor word lead to rejections.