Problem:
The store number is not known.

Solution:
The store number is mandatory information. Without this information, your documents can not be processed.
  
Please always use a unique anchor word, for example, "Store number".
Normally, the unique statement (the anchor word) should have been agreed during the test phase.
Please note that this anchor word, is ALWAYS to be maintained. That is the reason why typing errors within the anchor word also lead to rejections.