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Empty Biml Validation Items box in BIDS Helper 1.6.6 and below
It is possible to write Biml, check it for errors, get an empty Biml Validation Items box without any error messages, and then still be able to generate SSIS packages. Do you have an error in your code or not?
If you have experienced this, it may be caused by using illegal characters in SSIS tasks in your Biml code. These illegal characters are replaced by underscores when the SSIS packages are generated.