<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote"><span style="font-size:12.8px">I'll check if we can avoid this non-scalable approach.</span></div></div></div></blockquote><div><br></div><div>Thanks,</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span style="font-size:12.8px">Meanwhile, can you try option '-matrap false' to use P^T*A*P?</span></div><div><div class="h5"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><br></div></div></blockquote></div></div></div></div></div></blockquote><div><br></div><div>Treb can try this. </div></div></div></div>