Website software saving problems

[Carole]

I have been using Serif for my website for about three years now and not had any real problems with it.

Today it will not save the updated file, says:
Failed to save site
Not enough storage is available to complete this operation.
I have 23890 Kb in the file (prior to the update).
It uploads the changes to the webspace OK, just won't save the updated WPP file.

I've tried deleting a few things but it is still saying the same thing.
Oh and I have bags of space on my hard drive 175 Gb of free space.

I have been on the Serif Forum and they say there is no limit on space, so am perplexed why it won't save. 
I have had occasions when it fails to save the site, but then eventually does.

Wondered whether any of you had any ideas.  Don't want to close the file or I'll lose all the updates I have done when some files mysteriously disappeared and they are not recently added files, so no idea what is going on there.

Thanks

Carole

[Carole]

It's OK, I've sorted it now (well sort of).

I seem to have accidentlly closed the SERIF file (or did it close itself when I was out of the room??)
Lost much of the stuff I was trying to save, so will have to re-do it, but seems to be saving OK now.  So must have been a gremlin.

Carole