HELP: VMERG

sunlight

Hello, i am fighting since days: i have a transient case and the mesh changes with times. i have used blocks to create the mesh and vmerg is required for the baffles. I MUST keep the number of vertices constant and this does not happen, i tried "nodelete" in vmerg but then the baffles are ignored. I have kept the tolerance of 1e-6 because the smallest cells are around PLease Help. Thank you