Cannot change text frame connections ...

As part of a project 8 years ago (using FrameMaker 7.0) we created a Chart-Template-Master.fm file and Chart_Template-Definitions.edd file.

The edd file contains the definitions of all of the XML elements and formatting.

The fm file is the Master template for page layout, and is copied for charts, to import XML into.

The master currently has 4 text panels, each with two columns, and the flow was successfully connected, 8 years ago, so that the 4 boxes (in a 2x2 grid) successfully flowed 1 to 2 to 3 to 4 (see diagram below)

However newer charts have much more text that can be accomodated by the 4 text panels, so we are trying to add 4 more (5 to 😎

+--------+--------+--------+--------+

|        |        |        |        |

|        |        |        |        |

|   1    |   3    |   5    |   7    |

|        |        |        |        |

|        |        |        |        |

|        |        |        |        |

+--------+--------+--------+--------+

|        |        |        |        |

|        |        |        |        |

|   2    |   4    |   6    |   8    |

|        |        |        |        |

|        |        |        |        |

|        |        |        |        |

+--------+--------+--------+--------+

I have manged to create the 4 new text panels, and successfully linked 5 -> 6 -> 7 -> 8.

However when I try to link 4 -> 5, I get the error

"Cannot change text frame connections. Flow is structured".

I am attempting to do this in FrameMaker 7.2, any help greatly appreciated.

Marcus A.T MacWilliam,

1Spatial Ltd, Senior Software Engineer.