xbt_assert(value, "Property %s is undefined (where it should)", exist);
xbt_assert(!strcmp(value, "250"),
"Value of property %s is defined to %s (where it should be 250)",
exist, value);
XBT_INFO(" Property: %s old value: %s", exist, value);
xbt_assert(value, "Property %s is undefined (where it should)", exist);
xbt_assert(!strcmp(value, "250"),
"Value of property %s is defined to %s (where it should be 250)",
exist, value);
XBT_INFO(" Property: %s old value: %s", exist, value);