WEBENCH® Tools/LMZ34002: WEBENCH cannot create design error

Part Number: LMZ34002

Tool/software: WEBENCH® Design Tools

Dear Webench Team,

I am working on a design with the following requirements:

Vin= 22-26

Vout= -12V

Iout = 1A max

I did a WEBENCH with the LMZ34002 in the past and now it is saying this is not possible.  

Thanks,

Jason