VIX Error 3009 when powering off VMware Player 3.0

Hi!

I'm testing VIX API 1.8 with VMware Player 3.0. But sometimes when calling VixVM_PowerOff() I get the error code 3009 - VIX_E_POWEROP_SCRIPTS_NOT_AVAILABLE, with the message "Cannot execute scripts."

Any idea what could be causing this?

(A possible reason I see is that the PowerOn and PowerOff calls are close to each other.)