Hi,
I have noticed that it is difficult to use formula that references columns which names contain hyphens.
See example below, where the column “Short 1A” fails to reference column “1-A”, but “Short 3A” have no problem referencing column “3A” (which has no hyphen).
Sometimes you can trigger the auto-fill to detect the column if you temporarily add “” after the TableName, but then remove the “” after it has triggered the connection:
left(TableName.1-A"" , 1)
Best regards,
Rickard