Recoded "cbc19c" to make invalid units missing, fixes #107
Recoded "cbc19b" to make invalid units missing, fixes #106
Recoded "cbc18c" to make invalid units missing, fixes #105
Recoded "cbc18b" to make invalid units missing, fixes #104
Recoded "cbc17c" to make invalid units missing, fixes #103
Recoded "cbc17b" to make invalid units missing, fixes #102
Recoded "cbc16c" to make invalid units missing, fixes #101
Recoded "cbc15c" to make invalid units missing, fixes #100