Thank you for the input. 

Unfortunately, that was the first thing I tried, and again. Below are the related circumstances:

i) The issue still persists even if this ProSeries file is copied, pasted, run by another user other than the sole cloud owner, who shared file directories with us. 

ii) This issues occurs at random from my perspective. I found no relevant patterns. I work on one client and save the file, and next day this message pops up and I have no control over running this client file again. 

My preliminary conclusion is that the problem is somehow related between ProSeries and its file directories. 

Any comments or tips will be greatly appreciated.