Darren Gibbs

I just bought the upgrade to MaxMSP 5 this afternoon. I've been 

updating a patch since then. Spent about 3 hours on it. Just as I 

was starting to test it, Max has corrupted the file and it will no 

longer open... "bad header" is the error reported.

I just bought the upgrade to MaxMSP 5 this afternoon.  I've been  
updating a patch since then.  Spent about 3 hours on it.  Just as I  
was starting to test it, Max has corrupted the file and it will no  
longer open... "bad header" is the error reported.

corrupted-patch-file

Try opening the file with something like text edit and then saving it from text edit under a different name. This has worked for me in the past.

corrupted patch file