Additionally / alternatively, you've specified "vrs=" rather than "--vrs=". Was this intentional?
When I run ServiceImageManager --help, part of the help response is this:
-v recording-session-file, --vrs=recording-session-file
Specifies the recording session file that contains all the
configuration information for the recording or import operation.
...
-s vsi-file, --si-file=vsi-file
Specifies the name of the service image file to record or import
transactions into. If this file does not already exist, it will
be created. Otherwise the recorded/imported transactions will
be merged into the existing service image.
-m vsm-file, --vsm-file=vsm-file
Specifies the name of the virtual service model file to create
during a recording or import.
so it looks like your command line options all need to be checked for syntax.