excel autosave is turned off. file cannot be saved

[jelle]

I have a problem with saving a file in excel. It is an existing large (25MB) file, which I have saved several times on the same location. During my last session, I got the following errors:
when excel was calculating a big calculation, the following error occurred--> excel cannot complete this task with available resources
after the error, the following error was displayed--->AutoRecover has been disabled
when I wanted to save my file, excel was taking a long time to calculate and the following error was displayed---> Document not saved

It happened before and in the past the document was completely disappeared.(as in: gone)
I have tried several things:

- manually save the document is not possible because the "save" button on the start menu is not clickable anymore
- turning on the autosave is not possible because the autosave option is grayed out
- I have tried to copy the separate slides to another empty file. Unfortunately the new file has the same settings and cannot be changed.
- also the autosave copy is from last week, so all work I have done this week

I really need a excel expert to solve this, the file is a really important file I cannot lose.</SPAN>