parsing error help

[Donald Eugene Mines]

In trying to access my 2015 ledger file I get the following error message.

“there was an error parsing the file file:///Users/demadm/2015 <file:///Users/demadm/2015> Ledger.gnucash.”

I’m a Mac user, with OX 10.10.3 (Yosemite.  I need help in recovering this data ( no backup available) and preventing this from happening again.   Your kind help is appreciated.

DM