The formula I listed is not a question of doubt. It works. See image below and attached file
What may be of issue is that your data may have mixed case. "No" is not equal to "no", or "NO". If this is the case, then I suggest
If(
Uppercase( :A ) == "NO", "No",
Uppercase( :B ) == "NO", "No",
Uppercase( :C ) == "NO", "No",
Uppercase( :D ) == "NO", "No",
Uppercase( :E ) == "NO", "No",
Uppercase( :F ) == "NO", "No",
Uppercase( "Yes"
)
Also, please note the ":" in front of each column name. This is important for JMP to understand that it needs to look into a column by the specified name
Jim