It has happened several times that the connection list in the .save system description file contained the same connection more than once.
In the attached example file, these connections are contained more than once:
<CONNECTION>
<FROM id="ModeChange#6Impl" port="ModeSensL#10"/>
<TO id="Follow#18"Impl port="SensL#20"/>
<TO id="Find#32"Impl port="SensL#34"/>
</CONNECTION>
<CONNECTION>
<FROM id="ModeChange#6Impl" port="ModeSensR#11"/>
<TO id="Follow#18"Impl port="SensR#21"/>
<TO id="Find#32"Impl port="SensR#35"/>
</CONNECTION>
It seems that these duplicated connections appear when a connection is inserted into the design (in the graphical editor) and deleted from it with the "delete"-key instead of with the "delete from model" option in the right-click menu.
An example for the problem