Route error in Tube and pipe run

[imsbl]

There is a problem in the route, since its color has changed to brown, and i want to locate the issue. Other problems, coming along with this, are while editing the route the tube does not hide even after clicking display routes only option and also any new sketch/line in the route does not produce any pipe segment in this particular route.

 

Also the pipe segments and fittings in the browser have red update option which never updates and when pointed shows update deferred message and also the segments and pipes does not get deleted. I think it all relates to the route problem but the issue i route is first to be located.

 

Any suggestions on this issue are welcome.

 

Thanks

imsb