UTAU gives "Failed to generate wav file" error when rendering with VCV VB

[WorkFan208]

I'm using doppeltler and wavtool4vcv, and when i'm trying to render using VCV voicebank, utau gives "failed to generate wav file" error


When i'm using default resampler and wavtool/resampler.dll, it sings "kaoan" and not "kakonanka"
everything is okay with CV voicebanks
Note: it's imported midi

 

[Kiyoteru]

This is a different issue, but make sure that you've cleared the note properties and added portamento to the UST. Select all notes, and right click to access the menu.
Use Region Property in order to clear the preutterance and overlap.
Use Pitch in order to enable the portamento checkbox.