Datum feature label has syntax errors

The datum feature label has syntax errors and cannot be processed. The value of a datum feature label must meet the following criteria:

• Contain only capital letters and no numbers or special characters. (ASME 2009, ISO 2012)
• Contain a maximum of 2 characters (ASME 2009)
• Contain any number of characters (ISO 2012)
• Must not include the letters I, O, or Q. (ASME 2009)
• Must not include the letters I, O, Q, or X (ISO 2012)

To resolve this issue, edit the datum feature label and correct any syntax errors.