Line out error

Hello,

One of my student drew a flowchart, using Logicator. It came out that "line out errors" occurred. Moving blocks et redraw lines did not bring any improvement.

I opened the file with PE6 6.0.8.9. and tried to fix the problem, but does not work. I even get an arrow stuck at the bottom of the page and could not erase it...

The only way I found, was to open a new flowchart and copy the blocks, the add the lines.

Here is the file. Is it a corrupted file?

Unfortunately it does seem something has become confused with respect to the file and it is not easy to tell what that may be.

It's not a big deal, as it's the first time this error message is displayed for years.