ERROR (Line 36): The 'urn:us:gov:treasury:irs:ext:aca:air:7.0:PersonMiddleNm' element is invalid - The value 'M.' is invalid according to its datatype 'urn:us:gov:treasury:irs:ext:aca:air:7.0:PersonMiddleNameType' - The Pattern constraint failed.
Step 2: Reason
Middle name initial should be one letter only.
Step 3: Solution
You can use letter for name only. You should use "M" instead of "M." for middle name initial.