Measuring Load-Pull contours - Spectre User Guide example

Hi,

I am trying to generate load-pull contours to determine the optimal load of my amplifier. I work with virtuoso 6.1.5. I follow the instructions given in "Virtuoso Spectre Circuit Simulator RF Analysis User Guide", which is based on the rfExample library. I modify my schematic (check&save w/ success), the configure Spectre as expected.

But when I start the parametric analysis, new variables appear in the "Design Variables" list : thetaOff, iPata and i59. I right-click to find them on the schematic but it doesn't work (variable 'thetaoff' not found on the schematic).

If I choose a default value for these variables, then I get the following errors (they appear several times) :

Error found by spectre in `portAdapter', during circuit read-in.
    ERROR (SFE-874): "input.scs" 54: Unexpected comma ",". Expected close parenthesis.
    ERROR (SFE-683): "input.scs" 54: Badly formed parameters statement.
    ERROR (SFE-874): "input.scs" 54: Unexpected operator "*". Expected end of file or end of line.

Warning from spectre in `portAdapter', during circuit read-in.
    WARNING (SFE-702): "input.scs" 55: Use of the comma character in node lists is not supported.

Error found by spectre in `portAdapter', during circuit read-in.
    ERROR (SFE-874): "input.scs" 55: Unexpected operator "*". Expected end of file or end of line.
    ERROR (SFE-874): "input.scs" 55: Unexpected operator "*". Expected end of file or end of line.
    ERROR (SFE-874): "input.scs" 55: Unexpected operator "*". Expected end of file or end of line.
    ERROR (SFE-678): "input.scs" 55: Statement is not in Spectre format. Use `simulator lang=spice' to introduce spice language sections.

Error found by spectre during circuit read-in.
    ERROR (SFE-874): "input.scs" 72: Unexpected quoted string ""theta". Expected close parenthesis or comma.

I don't really understand where it comes from (the portAdapter component ? the file input.scs ?) ; nor how to solve it.
In my lab, no one already encountered this problem or know where it could come from.
 
Thanks,
Fabien