Stiffeness matrix with abaqus 6.14, MTX file not generate

[pls91]

Hello,

I should extract stiffness matrix from my model in abaqus. I addedd this lines (like suggested by several forum), in my file *inp :
*STEP
*MATRIX GENERATE, STIFFNESS
*MATRIX OUTPUT, STIFFNESS, FORMAT=MATRIX INPUT
*END STEP

I expect a *.mtx file containing the elements of the stiffness matrix, but I don't get this file, i try to search it in my C:\ pc, but nothing. I have only a binary file *.sim.

Can I obtain *.mtx file ?

THX