Hi,
the links are intentionally crippled as an anti-spam and protection measure, as there is no user verification for accessing the forum. You can still access the links if you intentionally copy & paste the address in your web browser replacing the '*' or skipping them (as most convenient).
I checked your input file but you did some mistake in your FreeCAD model. There appears to be a dangling node "NFHNode041" as per FreeCAD Combo Model View. It reflects in your FastHenry created input file, as the spiral stops at node NFHNode040
[Start snippet]
EFHPath38 NFHNode039 NFHNode040 w=0.2 h=0.2
EFHPath39 NFHNode040 NFHNode w=0.2 h=0.2
* Ports
.external NFHNode044 NFHNode043
[End snippet]
so you spiral actually never closes in a loop, and this causes FastHenry to find no valid path for the current, hence the error.
Best Regards,
Enrico