Cool, glad you figured it out. I have another on for you because I noticed that if my Batch SF: wasn’t 1, it would break. I think this fixes it:
FluidMorphStartFrameCtrl_2022.zip (103.7 KB)
Tweak to keep the matchbox in the stream:
FluidMorphStartFrameCtrl_2022_v02.zip (102.3 KB)