Dear qe users,<div id="yMail_cursorElementTracker_1540631035092"><br></div><div id="yMail_cursorElementTracker_1540631036044">I am trying to extract and draw the wave function by using pp.x code, however the code is evaluating nothing. Can you help me with what might be the issue please.</div><div id="yMail_cursorElementTracker_1540631201426"><br></div><div id="yMail_cursorElementTracker_1540631201931">Thank you in advance</div><div id="yMail_cursorElementTracker_1540631211607">Meral</div><div id="yMail_cursorElementTracker_1540631075127"><br><div id="ymail_android_signature"><a href="https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature">Sent from Yahoo Mail on Android</a></div></div>