[petsc-users] Warning [-Wformat-overflow]

[Ivan Luthfi]

I have  warning:

FormatFunction.c: In function 'ComputeStiffnessMatrix':
FormatFunction.c:128:46: warning: '%d' directive writing between 1 and 11
bytes into a region of size between 0 and 99 [-Wformat-overflow]
(line128) sprintf(filename, "%sc%d_N%dM%d_permeability.log",
up->problem_description, up->problem_flag, up->Nx, up->Mx)

do you know why this warning appear? and how to fix it.

-- 
Best regards,
--
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