Best would be to show a minimal crashing case.<p>log(1,0,0) does not crash it.<p>1.1 * log(1,0,0) crashes it.<p>log(1,0) is interpreted as "log of 0, base 1", which is -infinity.<p>log(1, 0, 0) / 1 is interpreted as log(1,0,0)<p>as is log(1,0,0) * 1<p>log(1,0,0) gets converted to the Mathematica form Log[1,0,0] which, from the documentation, makes no sense to me.<p>log(1,0,0) * 1.1 crashes it.<p>So it's some interaction of an undefined result and a floating point number. Have you sent a bug report to Wolfram?