I work with Abaqus CAE/Standard a lot!

Whenever I have tried to put the number below the \*Depvar keyword to be greater than 15 (and there can be any subroutines (UMAT or USDFLD) *with no coding in it*, just the basic input parameters as provided by Abaqus User Subroutine Guide), the job always, without fail, aborts right away and gives me the error: "Illegal memory reference (signal 11)". 

Keep in mind, there is no actual code anywhere in the user subroutine where there could be any mistake; I have tried this just as a curiosity, and just as expected, as soon as the number of dependent variable is higher than 15, it aborts right away!!!

What's the cause of this?