<div dir="ltr">Hello,<br><br>I attempted to download ndnSIM2.7 by following these steps: <br><br><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><span style="font-family:monospace">mkdir ndnSIM<br></span><span style="font-family:monospace">cd ndnSIM<br></span><span style="font-family:monospace">git clone <a href="https://github.com/named-data-ndnSIM/ns-3-dev.git">https://github.com/named-data-ndnSIM/ns-3-dev.git</a> ns-3<br></span><span style="font-family:monospace">git clone <a href="https://github.com/named-data-ndnSIM/pybindgen.git">https://github.com/named-data-ndnSIM/pybindgen.git</a> pybindgen<br></span><font face="monospace">git clone --recursive <a href="https://github.com/named-data-ndnSIM/ndnSIM.git">https://github.com/named-data-ndnSIM/ndnSIM.git</a> ns-3/src/ndnSIM<br><br></font><font face="monospace">cd ns-3/src/ndnSIM<br></font><font face="monospace">git checkout ndnSIM-2.7</font></blockquote><br>However, I encountered an error when trying to configure and build ndnSIM2.7. Though, no error occurs when I skip the <font face="monospace">git checkout ndnSIM-2.7</font> step.<br><br>Could anyone please provide some guidance on how to resolve this issue? I need to work on ndnSIM2.7 <div><br></div><div>Thanks,</div></div>