Even the alternate method is also not working for ASCII and Transactions tables
Comment Table Characters with 'Contains Characters';
Comment Table ASCII with 'Contains ASCII Values';
Comment Table Transactions with 'Contains Transaction Facts';
Comment Table Dummy with 'dummies values';
I guess the problem must be in the below statement in the Characters table.
Load Chr(RecNo()+Ord('A')-1) as Alpha, RecNo() as Num autogenerate 26;
If you change the Alpha to some other name then it's working fine.
Check the attachment.