Hi,
I don’t work with Indesign (CS4) but a team of people in the company do and they reported the same error. Links dropping and as a result Indesign (unable to repair the link) crashes. The one common thing between this forum and all other forums, everyone is working of network files and documents. I’ve asked 1 user to work locally to see if that will increase stability within Indesign. This is just a test and not very practical for a team collaborating together.
The link below gives a few hints and tips on how to get around it. People there are blaming IT admins for moving or deleting files. That’s not the case here. Indesign CS4 is a poor product with many bugs. 1 user mentions packaging the files. This is something I need to try out this week!
Best of luck!
Doons
https://creativebits.org/indesign_and_embedding_images