<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear Gromacs Specialists,</div><div><br></div><div>Sometimes, when I do "g_analyze -f .xvg -av -ee error.xvg" , I take following warning, and I don't know how to fix it.</div><div><br></div><div>Set 1: err.est. 0.000596502 a 0.29217 tau1 24.8856 tau2 443.641<br>Warning: tau2 is longer than the length of the data (864000)<br> the statistics might be bad<br>invalid fit: e.e. 0.285911 a 0.995985 tau1 1434.16 tau2 1.41932e+09<br>Will fix tau2 at the total time: 864000<br>Set 2: err.est. 0.00859257 a 0.995692 tau1 1432.7 tau2 864000<br>Set 3: err.est. 0.00527967 a 0.588024 tau1 804.83 tau2 3603.55<br>a fitted parameter is
negative<br>invalid fit: e.e. 0.00421461 a 1.08722 tau1 1672.3 tau2 6955.25<br>Will fix tau2 at the total
time: 864000<br>a fitted parameter is negative<br>invalid fit: e.e. -nan a 1.00449 tau1 1455.53 tau2 864000<br>Will use a single exponential fit for set 4<br>Set 4: err.est. 0.00453113 a 1 tau1 1400.34 tau2 0</div><div><br></div><div>Please help me.</div><div>Thanks in advance from your response.</div><div><br></div><div>Best Regards</div><div><br></div><div>Dina<br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br> </div></div></body></html>