Interlocking tower path icon has question mark


New member
Hi all,
very new to interlocking towers. Have set up a four path interlocking section in my route. Its working fine and am showing no errors on first screen as edit tabs are visible. When the paths become active though the yellow icons are always showing a question mark in the middle. What does this indicate? Any explanation in user manual for this? Search this forum and manual without success. Hope you can help. Using Trainz plus build 119450.

When you set the path you have a choice in the top portion to turn them on or off. This shoes when a junction is locked by a path.