Adobe FRAMEMAKER 6.0 Manual page 256

This message
WARNING: Circular text flow was found and cut.
WARNING: Circular text flow. Don't use the document.
Means
The MIF file defined a set of linked text frames resulting in a circular
text flow. (The last text frame in the flow is linked to the first or to
one in the middle.) The MIF interpreter attempted to solve the
problem by disconnecting a text frame.
The MIF file defined a set of linked text frames resulting in a circular
text flow. (The last text frame in the flow is linked to the first or to
one in the middle.) The MIF interpreter was unable to solve the
problem. A FrameMaker document file will open, but do not use it.
ADOBE FRAMEMAKER 6.0 256
MIF Messages