https://www.ptcusercommunity.com/t5/Arbortext/isodraw-7-3to7-4-freezes-4-mns-when-opening-an-existing-small/m-p/1052923#M33746 <P>Hello,</P><P>computer is wire connected to a LAN without full internet access, only some streams are opened (email, microsoft 365 streams but not any any streams)</P><P>node locked license on local hard drive<BR />once the file is opened, user can work correctly, no latencies<BR />my question: is isodraw attempting to reach a ptc server when it detects a network connection?<BR />it's not an antivirus issue regarding file extensions, we are able to open quickly *.iso *.cgm *.idr with a text editor.<BR />before analysing network streams out going from computer do you have any clues?<BR />same behaviour for all isodraw computers of network.<BR />i would appreciate some ideas to diagnose</P><P>thanks.</P><P>SB</P> Thu, 29 Jan 2026 18:14:35 GMT stephan_brestel 2026-01-29T18:14:35Z https://www.ptcusercommunity.com/t5/Arbortext/isodraw-7-3to7-4-freezes-4-mns-when-opening-an-existing-small/m-p/1052923#M33746 <P>Hello,</P><P>computer is wire connected to a LAN without full internet access, only some streams are opened (email, microsoft 365 streams but not any any streams)</P><P>node locked license on local hard drive<BR />once the file is opened, user can work correctly, no latencies<BR />my question: is isodraw attempting to reach a ptc server when it detects a network connection?<BR />it's not an antivirus issue regarding file extensions, we are able to open quickly *.iso *.cgm *.idr with a text editor.<BR />before analysing network streams out going from computer do you have any clues?<BR />same behaviour for all isodraw computers of network.<BR />i would appreciate some ideas to diagnose</P><P>thanks.</P><P>SB</P> Thu, 29 Jan 2026 18:14:35 GMT https://www.ptcusercommunity.com/t5/Arbortext/isodraw-7-3to7-4-freezes-4-mns-when-opening-an-existing-small/m-p/1052923#M33746 stephan_brestel 2026-01-29T18:14:35Z https://www.ptcusercommunity.com/t5/Arbortext/isodraw-7-3to7-4-freezes-4-mns-when-opening-an-existing-small/m-p/1057797#M33786 <P>Hi <SPAN style="background: var(--ck-color-mention-background); color: var(--ck-color-mention-text);"><a href="https://www.ptcusercommunity.com/t5/user/viewprofilepage/user-id/298811">@stephan_brestel</a></SPAN>,</P> <P><BR />Thank you for your question.&nbsp;<BR /><BR />Your post appears well documented but has not yet received any response. I am replying to raise awareness. Hopefully, another community member will be able to help.<BR /><BR />Also, feel free to add any additional information you think might be relevant. It sometimes helps to have screenshots to better understand what you are trying to do.&nbsp;</P> <P>&nbsp;</P> <P>Regards,</P> <P>Anurag&nbsp;</P> Mon, 09 Mar 2026 16:05:07 GMT https://www.ptcusercommunity.com/t5/Arbortext/isodraw-7-3to7-4-freezes-4-mns-when-opening-an-existing-small/m-p/1057797#M33786 anursingh 2026-03-09T16:05:07Z https://www.ptcusercommunity.com/t5/Arbortext/isodraw-7-3to7-4-freezes-4-mns-when-opening-an-existing-small/m-p/1057842#M33788 <P>hello,</P><P>i just need to know if isodraw is attempting to connect to internet as soon as it detects a network connection and which ips and ports. it would have no reason to do it, client is using a local nodelocked license.<BR />our latencies do not occur if computer is disconnected from LAN.</P><P>&nbsp;</P><P>Stephan.</P> Mon, 09 Mar 2026 19:27:57 GMT https://www.ptcusercommunity.com/t5/Arbortext/isodraw-7-3to7-4-freezes-4-mns-when-opening-an-existing-small/m-p/1057842#M33788 stephan_brestel 2026-03-09T19:27:57Z