File Opening error

Hi guys! I have one I have this EA which is having, avoiding major news events among filtering trades. This function is downloading news events from forexfactory and writhting in one csv file. All good and working fine if I load this EA to one chart. As soon as I open another chart and plugg the same EA in the same time, Error opening file  coming because is trying to open the same csv file ...How to go around this ? 
Open with shared read.
William Roeder #:
Open with shared read.

 Thanks! Where should I study details about this "shared read" ?