Synfig CLI render error codes

does anyone know the full list of error codes when rendering files with synfig from command line? i got a few that returned an error code of -6

Hi, it could be produced by a library too…
Could you provide more details ?

I was able to get the following in a terminal window when loading the file manually:
*** Error in `synfigstudio’: munmap_chunk(): invalid pointer: 0xb6173e98 ***
synfig would then crash . its funny because i can open the file with seemingly no problem in windows. Will try resaving file and loading onto synfig on linux tonight.