can't copy data from Drobo (Gen 2)...

i have two Drobo (Gen 2) units connected via FW800 to a Mac Pro running 10.9.5. when trying to copy files from the Drobos to my Mac Pro, i get the following message:

“The Finder can’t complete the operation because some data in “[filename]” can’t be read or written. (Error code -36)”

this is the first time i have run into this problem… does anyone have any idea what this is about? or, more importantly, how to fix it?

Try these link:

thanks so much for your suggestions… the last link looks like it is the most relevant, so i will start there.

i will update this thread as i troubleshoot…