warning #09 and #060
 

Hello,
I'm trying to simulate the injection of a spray of different fuel in a chamber. 3 parameters (injection pressure, chamber pressure and temperature) change according to the experiences.
When the temperature is low in the chamber or the pressure is high in the injector, star-cd3.26 can't simulation the injection because of this 2 errors :
- warning#09 = the scalar SC1 is below the minimum (0,00)
- warning#060 = negative density in a cell
What can I do to having a good result ?
I thank you in advance
Best regards
Simon