The current function that converts column numbers to the Excel format (A, ..., Z, AA, ..., ZZ, AAA, ...) cannot handle Excel column names larger than two characters : A=1 to ZZ =702 is possible, AAA = 703 and further is not.
This bug was fixed in repository and will be part of a future release; thanks for reporting.
This bug was fixed in repository and will be part of a future release; thanks for reporting.