"beneficiary of pending immigrant visa will not be eligible for a nonimmigrant visa"

[siblingvisaform130]

I'm a U.S. Citizen.

I want to submit a Form I-30 to petition for a Green Card for my sister who is in another country.

She has a multi-entry U.S. visitor visa, and frequently visits the U.S. for short trips.

This sentence, in the guidelines for Sibling Visa (section: Can my sibling come to the United States to live while the visa petition is pending?), caught my eye:

"In most instances, the beneficiary of a pending or approved immigrant visa will not be eligible for a nonimmigrant visa, although certain exceptions may apply."

My Question: Does this mean that applying for a Form I-30 for her will affect her visitor visa?

[Enub4]

From what I understand, the immigrant visa is not pending nor approved until there is an interview. I think the process is:
- Form I-130
- Send documents to NVC
- NVC review the case and set an interview on home country
- Interview and immigrant visa is approved or pending

I guess they could consider it pending at the time NVC approve the case even before setting the interview date, I'm not sure. What I read several times is that just filing form I-130 should not be a problem to have or renew a nonimmigrant visa if all the requirements are met.