For the sake of demonstration in a class I wanted to use the line:
Histogram[Accumulate[RandomReal[{-1, 1}, 100000]], {1}, "Probability"]
to get a probability-like distribution of the random walk process. This worked for me on Mma7, 8, and 9 returning a reasonable probability-like histogram. As soon as I do it now (Mma 10.0.2, Win7) I get for several times the desired histogram. However, after several (about 10) trials I suddenly see the word "Histogram" appearing in red color, and the whole thing stops working, with a message that Histogram is obsolete. So, (i) what happened? and (ii) Could I repair it?
Table[...,{200}]
andDo[...,{i,200}]
, where inside the operators there always was the above Histogram statement. No problem now. At least I did not notice with 200 repetitions. $\endgroup$