Hi Jan,
Thank you for being patience.
"Line Brdiging- arcs are not visible in Inch-Measurement unit" issue can be solved by changing all the symbols, Model and ConnectionPoints measurement unit to “Inches” and enable the “LineBridgingEnabled” property of the “model”. If it’s not enabled then arc will not be visible.
I have attached the sample that demonstrates this completely.
LineBridging1-142181568.zipPlease try the sample and let me know if you have any questions.
Regards,
Varalakshmi.R.S