<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div style="margin: 0px; word-break: break-word !important;"><span style="font-family: Calibri, sans-serif; font-size: 14.6667px; word-break: break-word !important;">Hi Flash User Group,</span></div><div style="margin: 0px; word-break: break-word !important;"><span style="font-family: Calibri, sans-serif; font-size: 14.6667px; word-break: break-word !important;"><br style="word-break: break-word !important;"></span></div><div style="margin: 0px; word-break: break-word !important;"><font face="Calibri, sans-serif" style="word-break: break-word !important;"><span style="font-size: 24px; word-break: break-word !important;">I am trying to calculate an incompressible hydrodynamics problem. So I added the following statement to the Config file.</span></font></div><div style="margin: 0px; word-break: break-word !important;"><img src="cid:3207c139$1$18a65cd1ec2$Coremail$gwyang991314$163.com" orgwidth="667" orgheight="41" data-image="1" style="width: 667px; height: 41px; border: none;"></div><div style="margin: 0px; word-break: break-word !important;"><br></div><div style="margin: 0px; word-break: break-word !important;"><span style="font-size: 24px;">However, During setup, the following error will be reported. Can you teach me how I can resolve it?</span></div><div style="margin: 0px; word-break: break-word !important;"><img src="cid:6e156fbe$2$18a65d23fbf$Coremail$gwyang991314$163.com" orgwidth="1208" orgheight="83" data-image="1" style="width: 1155px; height: 79px;"></div><div style="margin: 0px; word-break: break-word !important;"><br></div><div style="margin: 0px; word-break: break-word !important;"><span style="font-size: 24px;">Alternatively, incompressible conditions should not be set in this way.</span></div><div style="margin: 0px; word-break: break-word !important;"><span style="font-size: 24px;"><br></span></div><div style="margin: 0px; word-break: break-word !important;"><div style="margin: 0px; word-break: break-word !important;"><font face="Calibri, Arial, Helvetica, sans-serif"><span style="font-size: 16px;">I really appreciate any help you can provide.</span></font></div><div style="margin: 0px; word-break: break-word !important;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; word-break: break-word !important;"><br style="word-break: break-word !important;"></span></div><div style="margin: 0px; word-break: break-word !important;"><font face="Calibri, Arial, Helvetica, sans-serif" style="word-break: break-word !important;"><span style="font-size: 16px; word-break: break-word !important;">Yang</span></font></div></div></div>