Cannot synchronize one or more clips in the current selection because a match could not be found?!

[Buppha28870426nr9y]

I have been using premiere pro without any problem and I could synchronize the audios and videos, no problem either - which I just did earlier today. Now, I started editing again a few hours ago after a break and tried to synch the audios and videos as usual. But this time, no matter what I do it just keeps saying: " Cannot synchronize one or more clips in the current selection because a match could not be found."

What did I do wrong here? I did change an audio synching, though, in my last edit in which I increased the sound in one video under Audio Gain. Since then, I have been having problem with synchronizing audio and video files. Could that be the culprit?

Any help and feedback is greatly appreciated. Thanks.

[Kevin-Monahan]

Hi there @Buppha28870426nr9y,

I read your note with interest. See if our expert's advice here may help. Let us know if raising the levels of said clips can help the sync process. 

Thanks,
Kevin