I tried to reproduce the ofx import scenario from scenario_account_statement_ofx on demo5.0.tryton.org, with the provided file OFX.txt from account_statement_ofx (I changed only EUR to USD to fit the currency selected on demo).
I get this error alert : “The field “End Balance” on “Account Statement” is required”.
I had the same error here with my bank statement files. I cannot see any line in OFX standard that would provide such value. My conclusion would be that there is a useless validation in the wizard…