Problems with mig4nto utility

When I try to run the utility (in RtP) on my QNX4 source I get the
following errors:

/usr/bin/mig4nto[1]: cannot open pp%C: No such file or directory
/usr/bin/mig4nto[2]: Options:: not found
/usr/bin/mig4nto[3]: -m: not found
/usr/bin/mig4nto[4]: syntax error: ‘default’ unexpected

I am using a command line as close as possible to the example in the
migration guide. Any idea what I am doing wrong?