Hello,

I hope that someone can answer this.

I have made a file with 2013 at home,i hide sheets with vba and then unhide them with no issues in 2013 version
i am using if and isblank formula in 2013 with no problems.

But once i open the file then in 2007 version,the hiding and unhiding of sheets always errors and the formula
containing if and isblank is gone from the cells that they were in.

I can't figure this out.Is it some kind of compatiblity issue between the two versions.