Error Messages
ERROR MESSAGE: First Activity entry must be 'S'."
SOLUTION: Make sure to start First Activity with an 'S'.
ERROR MESSAGE: Start Activity's Duration must be 0.
SOLUTION: Change the duration for Start Activity to 0.
ERROR MESSAGE: Start Activity should not have any Predecessors.
SOLUTION: Make sure the Predecessors box for Start is empty.
ERROR MESSAGE: Activity name must be one letter.
SOLUTION: Make sure Activity boxes have one and one letter only.
ERROR MESSAGE: Please check Predecessor entries.
SOLUTION: Make sure Predecessor entries are valid.
ERROR MESSAGE: Finish Activity entry must be 'Z'.
SOLUTION: Make sure the Finish Activity entry is a 'Z'.
ERROR MESSAGE: Finish Activity's Duration must be 0.
SOLUTION: Change the duration for Finish Activity to 0.