Hi

I am facing very weired issue... we built a model in excel 2003 around a
year back... one of my team mate moved to version 2007 and he enhanced the
model a bit... everything was fine and we have used this enhanced model in
2007 for last few months but now all of sudden we have started facing very
weired issues...

this model is not allowing is any formatting changes... when we do certain
formatting changing save and close the file and when re-open the file all
changes are gone :(:(

excel is not even prompting any error message, its like it is not allowing
new formatting changes... just wondering why??

note: our model file size is aprrox 15 MB and we have got huge data and have
written many formulaes as well.. is that something causing the problem?? what
could be possible solution to this issue? please advise otherwise we are dead
:(

thanks in advance...