Test: running Payment is enabled as soon as a source account is selected

[vbar]

which isn't enough - the transaction also needs the destination account:

Other transactions might have the same problem...

[muzam1l]

Well we only treat source account field as requirement to make that Run test button work. We could go in for every transaction type and add info about required fields, but that's unnecessary as log just shows you errors correctly.

[vbar]

Well we only treat source account field as requirement to make that Run test button work. We could go in for every transaction type and add info about required fields

Well yes, that's what I'd expect from a high-quality GUI... :-) But yes, until users pay for (even failed) transactions it isn't critical...