Proper connection is not occurring while joining two vertically placed ducts with place ducts tool.
V8i:
CONNECT:
In V8i:
1. You have to first measure the center to center distance between two ducts. By placing smart line you can get the distance from properties.
2. Select Join duct, set the tolerance value according to the center to center distance. Always set it greater or equal to that center to center distance.
See the video below to get the workaround.
In CONNECT:
2. Select Connect Ducts/Pipes, set the tolerance value according to the center to center distance. Always set it greater or equal to that center to center distance.