<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">Hello All,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I have added heat pump air cooled chiller to my model and I have identified the loop to be 2-pipe loop but when I run the simulation, I get the following error. Can any one help suggest what would be the reason for this error. The PD2 and INP files are attached.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><img title="Inline image" alt="Inline image" src="cid:dea4cb0c-ed0e-6877-d8ac-396b57604ff6@yahoo.com" class="yahoo-inline-image" draggable="false" style="max-width: 532px; width: 100%;" data-id="<dea4cb0c-ed0e-6877-d8ac-396b57604ff6@yahoo.com>"><br><span></span><br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Regards</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Ahmad</div></div></body></html>