Diagnosis
You have entered either an invalid CFOP code or the code in theincorrect format.

Procedure
For CFOP codes valid before 1/1/2003, you must enter them asfollows:

• Total of five characters, either separated by a slash or not after the
third character: three digits followed by a slash (or no slash), thenone digit, then the last character is either a digit or a letter.Examples: 123/1A, 12345
For CFOP codes valid starting on 1/1/2003, you must enter themas follows:

• Total of six characters, either separated by a slash or not after the
fourth character: four digits followed by a slash (or no slash), thenlast two characters can be any combination of digits or letters.Examples: 123411, 1234AA, 1234A1, 12341A

Notes
The first digit must always be one of the following: 1, 2, 3, 5,6, or 7.
For codes valid prior to 1/1/2003, note that the system does notdifferentiate between codes entered with or without a slash. Forexample, 123/1A is equal to 1231A.