I have Sage 5.13 and VirtualBox 4.3.2 downloaded and installed on a Win7 machine.
First time I run the programs everything works well, when I try to reopen the files I left in VB (Save machine state), I get the following error message:
\t failed to load unit PATM \n\t
VER_SSM_LOADED_TO_MUCH
I tried to download the majority of the notebooks I worked on and leave in VB only one, however, the message appears again.