# NDsolve memory leak

Every time I run NDsolve it uses some memory that I am not able to free later.

The following is an example code based on the spring equation (Hooke's law) that increases memory usage by 280 bytes each iteration.

$HistoryLength = 0; tlimit = 1; x0 = 1; m = 1; k = 1; Do[ memory1 = MemoryInUse[]; Print[memory1]; sol = NDSolve[{x''[t] == -k/m*x[t], x[0] == x0, x'[0] == 0}, x, {t, 0., tlimit}]; Clear[sol]; ClearSystemCache[]; memory2 = MemoryInUse[]; Print[memory2]; , {x0, {0, 1, 2, 3}}] memory2 - memory1  As you can see I have already tried with $HistoryLenght = 0, ClearSystemCache[], Clear[sol]

Does anyone know how to free that memory again so that the memory usage will not increase at every iteration?

• Just asked a related question, if not duplicate, but with two MWE with different outcomes: mathematica.stackexchange.com/questions/116401/…. – anderstood Jun 27 '16 at 21:14
• Thank you for letting me know! Hope someone can shed some light into it. – Mike B. Jun 27 '16 at 22:50
• I was quite surprised you did not have any answer. I plan to give a bounty if I don't have an answer within two days. Here the correct link to the question: mathematica.stackexchange.com/questions/119501/… – anderstood Jun 27 '16 at 23:43
• Mike, you should report that to WRI. – user21 Jun 28 '16 at 17:17