Form more than 1 BPF

[phuocle]

If form more than 1 BPF access field it the BPF not current will throw exception

E.g

BPF 1, field A, B, C BPF 2, field A, B

Current BPF 2, access field C will throw exception because the field not in form.

Should find the way check run-time (in the design time file .d.ts not error)