After Effects - Error - Overflow converting ratio denominators 17 :: 19

To start, I make sure frame rate of the imported video(s) matches composition settings. 

Edits to videos when error occurs - Time Stretch and sometimes video will have mask. I believe the stretching (shortening) video creates the 17 :: 19 error? It has happened if the stretch factor is ANY whole# or decimal. 

Sometimes the error message repeatedly pops-up &  after closing error window error appears again & again. When this happens the ONLY option I have is to shut AE down.

I am lookig for a possible cause to avoid this error as in can kill the open project or make the project very time consuming.